EncoderForm.php
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Encoding.php
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Filters.php
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Validate.php
5 months ago
Encoding.php
620 lines
| 1 | <?php |
| 2 | |
| 3 | namespace OnlineOptimisation\EmailEncoderBundle\Validate; |
| 4 | |
| 5 | use OnlineOptimisation\EmailEncoderBundle\Traits\PluginHelper; |
| 6 | |
| 7 | class Encoding |
| 8 | { |
| 9 | use PluginHelper; |
| 10 | |
| 11 | private string $at_identifier; |
| 12 | |
| 13 | public function boot(): void |
| 14 | { |
| 15 | $this->at_identifier = $this->settings()->get_at_identifier(); |
| 16 | } |
| 17 | |
| 18 | |
| 19 | /** |
| 20 | * ###################### |
| 21 | * ### |
| 22 | * #### ENCODINGS |
| 23 | * ### |
| 24 | * ###################### |
| 25 | */ |
| 26 | |
| 27 | /** |
| 28 | * @param string $content |
| 29 | * @param bool $decode |
| 30 | * @return string |
| 31 | */ |
| 32 | public function temp_encode_at_symbol( string $content, bool $decode = false ) |
| 33 | { |
| 34 | if ( $decode ) { |
| 35 | return str_replace( $this->at_identifier, '@', $content ); |
| 36 | } |
| 37 | |
| 38 | return str_replace( '@', $this->at_identifier, $content ); |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * ASCII method |
| 43 | * |
| 44 | * @param string $value |
| 45 | * @param string $protection_text |
| 46 | * @return string |
| 47 | */ |
| 48 | public function encode_ascii( $value, $protection_text ) |
| 49 | { |
| 50 | $mail_link = $value; |
| 51 | |
| 52 | // first encode, so special chars can be supported |
| 53 | $mail_link = $this->helper()->encode_uri_components( $mail_link ); |
| 54 | |
| 55 | $mail_letters = ''; |
| 56 | |
| 57 | for ( $i = 0; $i < strlen( $mail_link ); $i++ ) { |
| 58 | $l = substr($mail_link, $i, 1); |
| 59 | |
| 60 | if (strpos($mail_letters, $l) === false) { |
| 61 | $p = wp_rand(0, strlen($mail_letters)); |
| 62 | $mail_letters = substr($mail_letters, 0, $p) . |
| 63 | $l . substr($mail_letters, $p, strlen($mail_letters)); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | $mail_letters_enc = str_replace( "\\", "\\\\", $mail_letters ); |
| 68 | $mail_letters_enc = str_replace( "\"", "\\\"", $mail_letters_enc ); |
| 69 | |
| 70 | $mail_indices = ''; |
| 71 | for ( $i = 0; $i < strlen( $mail_link ); $i++ ) { |
| 72 | $index = strpos( $mail_letters, substr( $mail_link, $i, 1 ) ); |
| 73 | $index += 48; |
| 74 | $mail_indices .= chr( $index ); |
| 75 | } |
| 76 | |
| 77 | $mail_indices = str_replace("\\", "\\\\", $mail_indices); |
| 78 | $mail_indices = str_replace("\"", "\\\"", $mail_indices); |
| 79 | |
| 80 | $element_id = 'eeb-' . wp_rand( 0, 1000000 ) . '-' . wp_rand(0, 1000000); |
| 81 | |
| 82 | return '<span id="' . $element_id . '"></span>' |
| 83 | . '<script type="text/javascript">' |
| 84 | . '(function() {' |
| 85 | . 'var ml="' . $mail_letters_enc . '",mi="' . $mail_indices . '",o="";' |
| 86 | . 'for(var j=0,l=mi.length;j<l;j++) {' |
| 87 | . 'o+=ml.charAt(mi.charCodeAt(j)-48);' |
| 88 | . '}document.getElementById("' . $element_id . '").innerHTML = decodeURIComponent(o);' // decode at the end, this way special chars can be supported |
| 89 | . '}());' |
| 90 | . '</script><noscript>' |
| 91 | . esc_html( $protection_text ) |
| 92 | . '</noscript>' |
| 93 | ; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Escape encoding method |
| 98 | * |
| 99 | * @param string $value |
| 100 | * @param string $protection_text |
| 101 | * @return string |
| 102 | */ |
| 103 | public function encode_escape( $value, $protection_text ) |
| 104 | { |
| 105 | $element_id = 'eeb-' . wp_rand( 0, 1000000 ) . '-' . wp_rand( 0, 1000000 ); |
| 106 | |
| 107 | //Validate escape sequences |
| 108 | $string = preg_replace('/\s+/S', " ", $value) ?? ''; |
| 109 | |
| 110 | // break string into array of characters, we can't use string_split because its php5 only |
| 111 | $split = preg_split( '||', $string ); |
| 112 | $out = '<span id="' . esc_attr( $element_id ) . '"></span>' |
| 113 | . '<script type="text/javascript">' |
| 114 | . 'document.getElementById("' . $element_id . '").innerHTML = decodeURIComponent("'; |
| 115 | |
| 116 | if ( is_array( $split ) ) |
| 117 | foreach ( $split as $c ) { |
| 118 | // preg split will return empty first and last characters, check for them and ignore |
| 119 | if ( ! empty( $c ) || $c === '0' ) { |
| 120 | $out .= '%' . dechex( ord( $c ) ); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | $out .= '");' |
| 125 | . '</script><noscript>' |
| 126 | . esc_html( $protection_text ) |
| 127 | . '</noscript>'; |
| 128 | |
| 129 | return $out; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Encode email in input field |
| 134 | * @param string $input |
| 135 | * @param string $email |
| 136 | * @param bool $strongEncoding |
| 137 | * @return string |
| 138 | */ |
| 139 | public function encode_input_field( $input, $email, $strongEncoding = false ) |
| 140 | { |
| 141 | |
| 142 | $show_encoded_check = (bool) $this->getSetting( 'show_encoded_check', true ); |
| 143 | |
| 144 | if ( $strongEncoding === false ) { |
| 145 | // encode email with entities (default wp method) |
| 146 | $sub_return = str_replace( $email, antispambot( $email ), $input ); |
| 147 | |
| 148 | if ( current_user_can( $this->getAdminCap( 'frontend-display-security-check' ) ) && $show_encoded_check ) { |
| 149 | $sub_return .= $this->get_encoded_email_icon(); |
| 150 | } |
| 151 | |
| 152 | return $sub_return; |
| 153 | } |
| 154 | |
| 155 | // add data-enc-email after "<input" |
| 156 | $inputWithDataAttr = substr( $input, 0, 6 ); |
| 157 | $inputWithDataAttr .= ' data-enc-email="' . esc_attr( $this->get_encoded_email( $email ) ) . '"'; |
| 158 | $inputWithDataAttr .= substr( $input, 6 ); |
| 159 | |
| 160 | // mark link as successfullly encoded (for admin users) |
| 161 | if ( current_user_can( $this->getAdminCap( 'frontend-display-security-check' ) ) && $show_encoded_check ) { |
| 162 | $inputWithDataAttr .= $this->get_encoded_email_icon(); |
| 163 | } |
| 164 | |
| 165 | // remove email from value attribute |
| 166 | $encInput = str_replace( $email, '', $inputWithDataAttr ); |
| 167 | |
| 168 | return $encInput; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Get encoded email, used for data-attribute (translate by javascript) |
| 173 | * |
| 174 | * @param string $email |
| 175 | * @return string |
| 176 | */ |
| 177 | public function get_encoded_email( $email ) |
| 178 | { |
| 179 | $encEmail = $email; |
| 180 | |
| 181 | // decode entities |
| 182 | $encEmail = html_entity_decode( $encEmail ); |
| 183 | |
| 184 | // rot13 encoding |
| 185 | // phpcs:ignore Generic.PHP.ForbiddenFunctions.Found -- str_rot13 is intentional for email obfuscation |
| 186 | $encEmail = str_rot13( $encEmail ); |
| 187 | |
| 188 | // replace @ |
| 189 | $encEmail = str_replace( '@', '[at]', $encEmail ); |
| 190 | |
| 191 | return $encEmail; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Get the ebcoded email icon |
| 196 | * |
| 197 | * @param string $text |
| 198 | * @return string |
| 199 | */ |
| 200 | public function get_encoded_email_icon( $text = 'Email encoded successfully!' ) |
| 201 | { |
| 202 | |
| 203 | $html = '<i class="eeb-encoded dashicons-before dashicons-lock" title="' . esc_attr( $text ) . '"></i>'; |
| 204 | |
| 205 | return apply_filters( 'eeb/validate/get_encoded_email_icon', $html, $text ); |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Create a protected email |
| 210 | * |
| 211 | * @param string $display |
| 212 | * @param array< string, string > $attrs |
| 213 | * @param string $protection_method |
| 214 | * @return string |
| 215 | */ |
| 216 | public function create_protected_mailto( $display, $attrs = [], $protection_method = null ) |
| 217 | { |
| 218 | $email = ''; |
| 219 | $class_ori = ( empty( $attrs['class'] ) ) ? '' : $attrs['class']; |
| 220 | $custom_class = (string) $this->getSetting( 'class_name', true ); |
| 221 | $show_encoded_check = (string) $this->getSetting( 'show_encoded_check', true ); |
| 222 | |
| 223 | if ( ! empty( $attrs['href'] ) && stripos( $attrs['href'], 'mailto:' ) === 0 ) { |
| 224 | $email = substr( $attrs['href'], 7 ); |
| 225 | } |
| 226 | |
| 227 | // set user-defined class |
| 228 | if ( $custom_class !== '' && strpos( $class_ori, $custom_class ) === false ) { |
| 229 | $attrs['class'] = ( empty( $attrs['class'] ) ) ? $custom_class : $attrs['class'] . ' ' . $custom_class; |
| 230 | } |
| 231 | |
| 232 | // check title for email address |
| 233 | if ( ! empty( $attrs['title'] ) ) { |
| 234 | $attrs['title'] = $this->filterPlainEmails( $attrs['title'], '{{email}}' ); // {{email}} will be replaced in javascript |
| 235 | } |
| 236 | |
| 237 | // set ignore to data-attribute to prevent being processed by WPEL plugin |
| 238 | $attrs['data-wpel-link'] = 'ignore'; |
| 239 | |
| 240 | // create element code |
| 241 | $link = '<a '; |
| 242 | |
| 243 | foreach ( $attrs as $key => $value ) { |
| 244 | if ( strtolower( $key ) === 'href' ) { |
| 245 | if ( $protection_method === 'without_javascript' ) { |
| 246 | $link .= $key . '="' . antispambot( $value ) . '" '; |
| 247 | } else { |
| 248 | $encoded_email = $this->get_encoded_email( $email ); |
| 249 | |
| 250 | // set attrs |
| 251 | $link .= 'href="javascript:;" '; |
| 252 | $link .= 'data-enc-email="' . esc_attr( $encoded_email ) . '" '; |
| 253 | } |
| 254 | |
| 255 | } else { |
| 256 | $link .= esc_attr( $key ) . '="' . esc_attr( $value ) . '" '; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | // remove last space |
| 261 | $link = substr( $link, 0, -1 ); |
| 262 | |
| 263 | $link .= '>'; |
| 264 | |
| 265 | // Only scramble the display when it IS the email (classic <a href="mailto:x">x</a> shape). |
| 266 | // When the display holds richer content (e.g. a builder-wrapped <span>Email us at x</span>), |
| 267 | // keep the markup intact — the final filterPlainEmails pass below entity-encodes any emails |
| 268 | // still embedded in it so bots can't harvest them. |
| 269 | $display_is_just_email = ( $email !== '' && trim( strip_tags( (string) $display ) ) === $email ); |
| 270 | |
| 271 | if ( $display_is_just_email ) { |
| 272 | $link .= $this->get_protected_display( $display, $protection_method ); |
| 273 | } else { |
| 274 | $link .= $display; |
| 275 | } |
| 276 | |
| 277 | $link .= '</a>'; |
| 278 | |
| 279 | // filter |
| 280 | $link = apply_filters( 'eeb_mailto', $link, $display, $email, $attrs ); |
| 281 | |
| 282 | // just in case there are still email addresses f.e. within title-tag |
| 283 | $link = $this->filterPlainEmails( $link, null, 'char_encode' ); |
| 284 | |
| 285 | // mark link as successfullly encoded (for admin users) |
| 286 | if ( current_user_can( $this->getAdminCap( 'frontend-display-security-check' ) ) && $show_encoded_check !== '' ) { |
| 287 | $link .= $this->get_encoded_email_icon(); |
| 288 | } |
| 289 | |
| 290 | |
| 291 | return $link; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Create a protected custom attribute |
| 296 | * |
| 297 | * @param string $display |
| 298 | * @param array< string, string > $attrs Optional |
| 299 | * @param string $protection_method |
| 300 | * @return string |
| 301 | */ |
| 302 | public function create_protected_href_att( $display, $attrs = [], $protection_method = null ) |
| 303 | { |
| 304 | $email = ''; |
| 305 | $class_ori = ( empty( $attrs['class'] ) ) ? '' : $attrs['class']; |
| 306 | $custom_class = (string) $this->getSetting( 'class_name', true ); |
| 307 | $show_encoded_check = (string) $this->getSetting( 'show_encoded_check', true ); |
| 308 | |
| 309 | // set user-defined class |
| 310 | if ( $custom_class !== '' && strpos( $class_ori, $custom_class ) === false ) { |
| 311 | $attrs['class'] = ( empty( $attrs['class'] ) ) ? $custom_class : $attrs['class'] . ' ' . $custom_class; |
| 312 | } |
| 313 | |
| 314 | // check title for email address |
| 315 | if ( ! empty( $attrs['title'] ) ) { |
| 316 | $attrs['title'] = antispambot( $attrs['title'] ); |
| 317 | } |
| 318 | |
| 319 | // set ignore to data-attribute to prevent being processed by WPEL plugin |
| 320 | $attrs['data-wpel-link'] = 'ignore'; |
| 321 | |
| 322 | // create element code |
| 323 | $link = '<a '; |
| 324 | |
| 325 | foreach ( $attrs as $key => $value ) { |
| 326 | if ( strtolower( $key ) === 'href' ) { |
| 327 | $link .= $key . '="' . antispambot( $value ) . '" '; |
| 328 | } else { |
| 329 | $link .= esc_attr( $key ) . '="' . esc_attr( $value ) . '" '; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | // remove last space |
| 334 | $link = substr( $link, 0, -1 ); |
| 335 | |
| 336 | $link .= '>'; |
| 337 | |
| 338 | $link .= $this->get_protected_display( $display, $protection_method ); |
| 339 | |
| 340 | $link .= '</a>'; |
| 341 | |
| 342 | // filter |
| 343 | $link = apply_filters( 'eeb_custom_href', $link, $display, $email, $attrs ); |
| 344 | |
| 345 | // mark link as successfullly encoded (for admin users) |
| 346 | if ( current_user_can( $this->getAdminCap( 'frontend-display-security-check' ) ) && $show_encoded_check ) { |
| 347 | $link .= $this->get_encoded_email_icon( 'Custom attribute encoded successfully!' ); |
| 348 | } |
| 349 | |
| 350 | |
| 351 | return $link; |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * Create protected display combining these 3 methods: |
| 356 | * - reversing string |
| 357 | * - adding no-display spans with dummy values |
| 358 | * - using the wp antispambot function |
| 359 | * |
| 360 | * @param string|array<string> $display |
| 361 | * @param string $protection_method |
| 362 | * @return string Protected display |
| 363 | */ |
| 364 | public function get_protected_display( $display, $protection_method = null ) |
| 365 | { |
| 366 | |
| 367 | $convert_plain_to_image = (bool) $this->getSetting( 'convert_plain_to_image', true, 'filter_body' ); |
| 368 | $protection_text = (string) $this->getSetting( 'protection_text', true ); |
| 369 | $raw_display = $display; |
| 370 | |
| 371 | // get display out of array (result of preg callback) |
| 372 | if ( is_array( $display ) ) { |
| 373 | $display = $display[0]; |
| 374 | } |
| 375 | |
| 376 | if ( $convert_plain_to_image ) { |
| 377 | // generate_email_image_url() requires a bare email address (it runs is_email() |
| 378 | // on its input and returns false otherwise). Page builders like WPForms, Divi, |
| 379 | // and Elementor commonly wrap the email in HTML (<span>x</span>) or surround |
| 380 | // it with copy ("Contact us at x"), which previously produced <img src=""> |
| 381 | // — the broken image rendered invisibly on the frontend. |
| 382 | $email_for_image = $display; |
| 383 | if ( ! is_email( (string) $display ) ) { |
| 384 | $stripped = wp_strip_all_tags( (string) $display ); |
| 385 | $email_match = []; |
| 386 | if ( preg_match( $this->settings()->get_email_regex(), $stripped, $email_match ) ) { |
| 387 | $email_for_image = $email_match[0]; |
| 388 | } |
| 389 | } |
| 390 | $display = '<img src="' . $this->generate_email_image_url( $email_for_image ) . '" />'; |
| 391 | } elseif ( $protection_method !== 'without_javascript' ) { |
| 392 | $display = $this->dynamic_js_email_encoding( $display, $protection_text ); |
| 393 | } else { |
| 394 | $display = $this->encode_email_css( $display ); |
| 395 | } |
| 396 | |
| 397 | return apply_filters( 'eeb/validate/get_protected_display', $display, $raw_display, $protection_method, $protection_text ); |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * Dynamic email encoding with certain javascript methods |
| 402 | * |
| 403 | * @param string $email |
| 404 | * @param string $protection_text |
| 405 | * @return string the encoded email |
| 406 | */ |
| 407 | public function dynamic_js_email_encoding( $email, $protection_text = '' ) |
| 408 | { |
| 409 | $return = $email; |
| 410 | $rand = apply_filters( 'eeb/validate/random_encoding', wp_rand( 0, 2 ), $email, $protection_text ); |
| 411 | |
| 412 | switch ( $rand ) { |
| 413 | case 2: |
| 414 | $return = $this->encode_escape( $return, $protection_text ); |
| 415 | break; |
| 416 | case 1: |
| 417 | $return = $this->encode_ascii( $return, $protection_text ); |
| 418 | break; |
| 419 | default: |
| 420 | $return = $this->encode_ascii( $return, $protection_text ); |
| 421 | break; |
| 422 | } |
| 423 | |
| 424 | return $return; |
| 425 | } |
| 426 | |
| 427 | /** |
| 428 | * @param string $display |
| 429 | * @return string |
| 430 | */ |
| 431 | public function encode_email_css( $display ) |
| 432 | { |
| 433 | $deactivate_rtl = (bool) $this->getSetting( 'deactivate_rtl', true, 'filter_body' ); |
| 434 | |
| 435 | // $this->log( 'display: ' . $display ); |
| 436 | $stripped_display = wp_strip_all_tags( $display ); |
| 437 | $stripped_display = html_entity_decode( $stripped_display ); |
| 438 | |
| 439 | $length = strlen( $stripped_display ); |
| 440 | $interval = (int) ceil( min( 5, $length / 2 ) ); |
| 441 | $offset = 0; |
| 442 | $dummy_data = time(); |
| 443 | $protected = ''; |
| 444 | $protection_classes = 'eeb'; |
| 445 | |
| 446 | if ( $deactivate_rtl ) { |
| 447 | $rev = $stripped_display; |
| 448 | $protection_classes .= ' eeb-nrtl'; |
| 449 | } else { |
| 450 | // reverse string ( will be corrected with CSS ) |
| 451 | $rev = strrev( $stripped_display ); |
| 452 | $protection_classes .= ' eeb-rtl'; |
| 453 | } |
| 454 | |
| 455 | |
| 456 | while ( $offset < $length ) { |
| 457 | $protected .= '<span class="eeb-sd">' . antispambot( substr( $rev, $offset, $interval ) ) . '</span>'; |
| 458 | |
| 459 | // Dummy content between real segments confuses scrapers. It's kept hidden from |
| 460 | // humans via CSS, but we also inline display:none so it never leaks as visible |
| 461 | // text if the plugin's stylesheet fails to load (page builders that defer/strip |
| 462 | // CSS, caching layers, or other plugins dropping the eeb-css-frontend handle). |
| 463 | $protected .= '<span class="eeb-nodis" style="display:none">' . $dummy_data . '</span>'; |
| 464 | $offset += $interval; |
| 465 | } |
| 466 | |
| 467 | // Inline the bidi-override / word-break styles for the same reason the dummy spans |
| 468 | // inline display:none — the email must still render correctly (forward, not reversed) |
| 469 | // when the stylesheet isn't loaded. |
| 470 | $wrapper_style = $deactivate_rtl |
| 471 | ? 'word-break:break-all' |
| 472 | : 'unicode-bidi:bidi-override;direction:rtl'; |
| 473 | |
| 474 | $protected = '<span class="' . $protection_classes . '" style="' . $wrapper_style . '">' . $protected . '</span>'; |
| 475 | |
| 476 | return $protected; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /** |
| 481 | * @return string |
| 482 | */ |
| 483 | public function email_to_image( string $email, string $image_string_color = 'default', string $image_background_color = 'default', int $alpha_string = 0, int $alpha_fill = 127, int $font_size = 4 ) |
| 484 | { |
| 485 | |
| 486 | $setting_image_string_color = (string) $this->getSetting( 'image_color', true, 'image_settings' ); |
| 487 | $setting_image_background_color = (string) $this->getSetting( 'image_background_color', true, 'image_settings' ); |
| 488 | $image_text_opacity = (int) $this->getSetting( 'image_text_opacity', true, 'image_settings' ); |
| 489 | $image_background_opacity = (int) $this->getSetting( 'image_background_opacity', true, 'image_settings' ); |
| 490 | $image_font_size = (int) $this->getSetting( 'image_font_size', true, 'image_settings' ); |
| 491 | $border_height = (int) $this->getSetting( 'image_underline', true, 'image_settings' ); |
| 492 | $border_padding = 0; |
| 493 | $border_offset = 2; |
| 494 | |
| 495 | if ( $image_background_color === 'default' ) { |
| 496 | $image_background_color = $setting_image_background_color; |
| 497 | } else { |
| 498 | $image_background_color = '0,0,0'; |
| 499 | } |
| 500 | |
| 501 | $colors = explode( ',', $image_background_color ); |
| 502 | $bg_red = max( 0, min( 255, (int) $colors[0] ) ); |
| 503 | $bg_green = max( 0, min( 255, (int) $colors[1] ) ); |
| 504 | $bg_blue = max( 0, min( 255, (int) $colors[2] ) ); |
| 505 | |
| 506 | if ( $image_string_color === 'default' ) { |
| 507 | $image_string_color = $setting_image_string_color; |
| 508 | } else { |
| 509 | $image_string_color = '0,0,0'; |
| 510 | } |
| 511 | |
| 512 | $colors = explode( ',', $image_string_color ); |
| 513 | $string_red = max( 0, min( 255, (int) $colors[0] ) ); |
| 514 | $string_green = max( 0, min( 255, (int) $colors[1] ) ); |
| 515 | $string_blue = max( 0, min( 255, (int) $colors[2] ) ); |
| 516 | |
| 517 | if ( |
| 518 | ! empty( $image_text_opacity ) |
| 519 | && $image_text_opacity >= 0 |
| 520 | && $image_text_opacity <= 127 |
| 521 | ) { |
| 522 | $alpha_string = intval( $image_text_opacity ); |
| 523 | } |
| 524 | $alpha_string = max( 0, min( 127, $alpha_string ) ); |
| 525 | |
| 526 | if ( |
| 527 | ! empty( $image_background_opacity ) |
| 528 | && $image_background_opacity >= 0 |
| 529 | && $image_background_opacity <= 127 |
| 530 | ) { |
| 531 | $alpha_fill = intval( $image_background_opacity ); |
| 532 | } |
| 533 | $alpha_fill = max( 0, min( 127, $alpha_fill ) ); |
| 534 | |
| 535 | if ( ! empty( $image_font_size ) && $image_font_size >= 1 && $image_font_size <= 5 ) { |
| 536 | $font_size = intval( $image_font_size ); |
| 537 | } |
| 538 | |
| 539 | $img_width = max( 1, imagefontwidth( $font_size ) * strlen( $email ) ); |
| 540 | $img_height = imagefontheight( $font_size ); |
| 541 | |
| 542 | if ( ! empty( $border_height ) ) { |
| 543 | $img_real_height = max( 1, $img_height + $border_offset + $border_height ); |
| 544 | } else { |
| 545 | $img_real_height = max( 1, $img_height ); |
| 546 | } |
| 547 | |
| 548 | $img = imagecreatetruecolor( $img_width, $img_real_height ); |
| 549 | imagesavealpha( $img, true ); |
| 550 | imagefill( $img, 0, 0, max( 0, imagecolorallocatealpha($img, $bg_red, $bg_green, $bg_blue, $alpha_fill ) ) ); |
| 551 | imagestring( |
| 552 | $img, |
| 553 | $font_size, |
| 554 | 0, |
| 555 | 0, |
| 556 | $email, |
| 557 | max( 0, imagecolorallocatealpha( $img, $string_red, $string_green, $string_blue, $alpha_string ) ) |
| 558 | ); |
| 559 | |
| 560 | |
| 561 | if ( ! empty( $border_height ) ) { |
| 562 | $border_fill = imagecolorallocatealpha ($img, $string_red, $string_green, $string_blue, $alpha_string ); |
| 563 | imagefilledrectangle( |
| 564 | $img, |
| 565 | 0, |
| 566 | $border_offset + $img_height + $border_height - 1, |
| 567 | $border_padding + $img_width, |
| 568 | $border_offset + $img_height, |
| 569 | max( 0, $border_fill ) |
| 570 | ); |
| 571 | } |
| 572 | |
| 573 | ob_start(); |
| 574 | imagepng( $img ); |
| 575 | imagedestroy( $img ); |
| 576 | |
| 577 | return (string) ob_get_clean(); |
| 578 | } |
| 579 | |
| 580 | |
| 581 | /** |
| 582 | * @param string $email |
| 583 | * @param string $secret |
| 584 | * @return string|bool |
| 585 | */ |
| 586 | public function generate_email_signature( string $email, string $secret ) |
| 587 | { |
| 588 | |
| 589 | if ( ! $secret ) { |
| 590 | return false; |
| 591 | } |
| 592 | |
| 593 | $hash_signature = apply_filters( 'eeb/validate/email_signature', 'sha256', $email ); |
| 594 | |
| 595 | return base64_encode( hash_hmac( $hash_signature, $email, $secret, true ) ); |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * @param string $email |
| 600 | * @return string|bool |
| 601 | */ |
| 602 | public function generate_email_image_url( ?string $email ) |
| 603 | { |
| 604 | if ( ! function_exists( 'imagefontwidth' ) || empty( $email ) || ! is_email( $email ) ) { |
| 605 | return false; |
| 606 | } |
| 607 | |
| 608 | $secret = $this->settings()->get_email_image_secret(); |
| 609 | $signature = (string) $this->generate_email_signature( $email, $secret ); |
| 610 | $url = home_url(); |
| 611 | $url .= '?eeb_mail=' . urlencode( base64_encode( $email ) ); |
| 612 | $url .= '&eeb_hash=' . urlencode( $signature ); |
| 613 | |
| 614 | $url = apply_filters( 'eeb/validate/generate_email_image_url', $url, $email ); |
| 615 | |
| 616 | return $url; |
| 617 | } |
| 618 | |
| 619 | } |
| 620 |