| @@ -5,8 +5,10 @@ | ||
| 5 | 5 | use Exception; |
| 6 | 6 | use FluentForm\App\Helpers\Helper; |
| 7 | 7 | use FluentForm\App\Models\Form; |
| 8 | 8 | use FluentForm\App\Models\FormMeta; |
| 9 | +use FluentForm\App\Services\FormBuilder\AutocompleteTokens; | |
| 10 | +use FluentForm\App\Services\FormBuilder\DateConfigPolicy; | |
| 9 | 11 | use FluentForm\App\Services\FormBuilder\RatingIcon; |
| 10 | 12 | use FluentForm\Framework\Support\Arr; |
| 11 | 13 | use FluentForm\App\Modules\Form\FormFieldsParser; |
| 12 | 14 | |
| @@ -13,13 +15,13 @@ | ||
| 13 | 15 | class Updater |
| 14 | 16 | { |
| 15 | 17 | public function update($attributes = []) |
| 16 | 18 | { |
| 17 | - $formId = (int)Arr::get($attributes, 'form_id'); | |
| 19 | + $formId = (int) Arr::get($attributes, 'form_id'); | |
| 18 | 20 | $formFields = Arr::get($attributes, 'formFields'); |
| 19 | 21 | $status = sanitize_text_field(Arr::get($attributes, 'status', 'published')); |
| 20 | 22 | $title = sanitize_text_field(Arr::get($attributes, 'title')); |
| 21 | - | |
| 23 | + | |
| 22 | 24 | $this->validate([ |
| 23 | 25 | 'title' => $title, |
| 24 | 26 | 'formFields' => $formFields, |
| 25 | 27 | ]); |
| @@ -40,9 +42,9 @@ | ||
| 40 | 42 | $formFields = apply_filters_deprecated( |
| 41 | 43 | 'fluentform_form_fields_update', |
| 42 | 44 | [ |
| 43 | 45 | $formFields, |
| 44 | - $formId | |
| 46 | + $formId, | |
| 45 | 47 | ], |
| 46 | 48 | FLUENTFORM_FRAMEWORK_UPGRADE, |
| 47 | 49 | 'fluentform/form_fields_update', |
| 48 | 50 | 'Use fluentform/form_fields_update instead of fluentform_form_fields_update.' |
| @@ -47,16 +49,17 @@ | ||
| 47 | 49 | 'fluentform/form_fields_update', |
| 48 | 50 | 'Use fluentform/form_fields_update instead of fluentform_form_fields_update.' |
| 49 | 51 | ); |
| 50 | 52 | $formFields = apply_filters('fluentform/form_fields_update', $formFields, $formId); |
| 51 | - $formFields = $this->sanitizeFields($formFields); | |
| 53 | + $formFields = $this->sanitizeFields($formFields, $form->form_fields); | |
| 52 | 54 | $data['form_fields'] = $formFields; |
| 53 | 55 | /** |
| 54 | 56 | * Fires before a Form is updated. |
| 57 | + * | |
| 55 | 58 | * @since 5.2.1 |
| 56 | 59 | */ |
| 57 | 60 | do_action('fluentform/before_updating_form', $form, $data); |
| 58 | - | |
| 61 | + | |
| 59 | 62 | $form->fill($data); |
| 60 | 63 | |
| 61 | 64 | if (FormFieldsParser::hasPaymentFields($form)) { |
| 62 | 65 | $data['has_payment'] = 1; |
| @@ -64,9 +67,9 @@ | ||
| 64 | 67 | $data['has_payment'] = 0; |
| 65 | 68 | } |
| 66 | 69 | |
| 67 | 70 | $this->updatePrimaryEmail($form); |
| 68 | - | |
| 71 | + | |
| 69 | 72 | } |
| 70 | 73 | |
| 71 | 74 | $form->fill($data)->save(); |
| 72 | 75 | |
| @@ -92,9 +95,10 @@ | ||
| 92 | 95 | $duplicateRankingFields = implode(', ', array_unique($duplicateRankingFields)); |
| 93 | 96 | |
| 94 | 97 | throw new Exception( |
| 95 | 98 | sprintf( |
| 96 | - __('Ranking field %s has duplicate option values. Please make each option value unique.', 'fluentform'), | |
| 99 | + // translators: %s is the ranking field name(s) with duplicate option values. | |
| 100 | + esc_html__('Ranking field %s has duplicate option values. Please make each option value unique.', 'fluentform'), | |
| 97 | 101 | esc_html($duplicateRankingFields) |
| 98 | 102 | ) |
| 99 | 103 | ); |
| 100 | 104 | } |
| @@ -104,17 +108,25 @@ | ||
| 104 | 108 | throw new Exception('The title field is required.'); |
| 105 | 109 | } |
| 106 | 110 | } |
| 107 | 111 | |
| 108 | - private function sanitizeFields($formFields) | |
| 112 | + private function sanitizeFields($formFields, $existingFormFields) | |
| 109 | 113 | { |
| 110 | 114 | if (fluentformCanUnfilteredHTML()) { |
| 111 | 115 | return $formFields; |
| 112 | 116 | } |
| 113 | - | |
| 117 | + | |
| 114 | 118 | $fieldsArray = json_decode($formFields, true); |
| 119 | + $existingFieldsArray = json_decode($existingFormFields, true); | |
| 120 | + $existingFields = Arr::get($existingFieldsArray, 'fields', []); | |
| 115 | 121 | |
| 116 | 122 | if (isset($fieldsArray['submitButton'])) { |
| 123 | + if (!empty($fieldsArray['submitButton']['attributes'])) { | |
| 124 | + $fieldsArray['submitButton']['attributes'] = $this->dropEventHandlerAttributeKeys( | |
| 125 | + $fieldsArray['submitButton']['attributes'] | |
| 126 | + ); | |
| 127 | + } | |
| 128 | + | |
| 117 | 129 | $fieldsArray['submitButton']['settings']['button_ui']['text'] = fluentform_sanitize_html( |
| 118 | 130 | $fieldsArray['submitButton']['settings']['button_ui']['text'] |
| 119 | 131 | ); |
| 120 | 132 | |
| @@ -124,8 +136,9 @@ | ||
| 124 | 136 | ); |
| 125 | 137 | } |
| 126 | 138 | } |
| 127 | 139 | $fieldsArray['fields'] = $this->sanitizeFieldMaps($fieldsArray['fields']); |
| 140 | + $fieldsArray['fields'] = DateConfigPolicy::preserveStored($fieldsArray['fields'], $existingFields); | |
| 128 | 141 | $fieldsArray['fields'] = $this->sanitizeCustomSubmit($fieldsArray['fields']); |
| 129 | 142 | if ($stepsWrapper = Arr::get($fieldsArray, 'stepsWrapper')) { |
| 130 | 143 | $fieldsArray['stepsWrapper'] = $this->sanitizeStepsWrapper($stepsWrapper); |
| 131 | 144 | } |
| @@ -139,17 +152,18 @@ | ||
| 139 | 152 | return $fields; |
| 140 | 153 | } |
| 141 | 154 | |
| 142 | 155 | $attributesMap = [ |
| 143 | - 'name' => 'sanitize_key', | |
| 144 | - 'value' => 'sanitize_textarea_field', | |
| 145 | - 'id' => 'sanitize_key', | |
| 146 | - 'class' => 'sanitize_text_field', | |
| 147 | - 'placeholder' => 'sanitize_text_field', | |
| 156 | + 'name' => 'sanitize_key', | |
| 157 | + 'value' => 'sanitize_textarea_field', | |
| 158 | + 'id' => 'sanitize_key', | |
| 159 | + 'class' => 'sanitize_text_field', | |
| 160 | + 'placeholder' => 'sanitize_text_field', | |
| 161 | + 'autocomplete' => [AutocompleteTokens::class, 'sanitize'], | |
| 148 | 162 | ]; |
| 149 | 163 | |
| 150 | 164 | $attributesKeys = array_keys($attributesMap); |
| 151 | - | |
| 165 | + | |
| 152 | 166 | $settingsMap = [ |
| 153 | 167 | 'container_class' => 'sanitize_text_field', |
| 154 | 168 | 'label' => 'fluentform_sanitize_html', |
| 155 | 169 | 'tnc_html' => 'fluentform_sanitize_html', |
| @@ -168,8 +182,13 @@ | ||
| 168 | 182 | 'html_codes' => 'fluentform_sanitize_html', |
| 169 | 183 | 'description' => 'fluentform_sanitize_html', |
| 170 | 184 | 'grid_columns' => [Helper::class, 'sanitizeArrayKeysAndValues'], |
| 171 | 185 | 'grid_rows' => [Helper::class, 'sanitizeArrayKeysAndValues'], |
| 186 | + 'max_repeat_field' => [$this, 'sanitizeRepeatLimit'], | |
| 187 | + 'display_mode' => [$this, 'sanitizeDisplayMode'], | |
| 188 | + 'display_type' => [$this, 'sanitizeClassSetting'], | |
| 189 | + 'pricing_options' => [$this, 'sanitizePricingOptionImages'], | |
| 190 | + 'subscription_options' => [$this, 'sanitizeSubscriptionOptions'], | |
| 172 | 191 | 'enable_crop' => 'sanitize_text_field', |
| 173 | 192 | 'crop_mode' => 'sanitize_text_field', |
| 174 | 193 | 'crop_ratio' => 'sanitize_text_field', |
| 175 | 194 | 'crop_width' => 'absint', |
| @@ -174,10 +193,13 @@ | ||
| 174 | 193 | 'crop_ratio' => 'sanitize_text_field', |
| 175 | 194 | 'crop_width' => 'absint', |
| 176 | 195 | 'crop_height' => 'absint', |
| 177 | 196 | 'enforce_image_dimensions' => 'sanitize_text_field', |
| 197 | + 'start_text' => 'fluentform_sanitize_html', | |
| 198 | + 'end_text' => 'fluentform_sanitize_html', | |
| 199 | + 'price_label' => 'fluentform_sanitize_html', | |
| 200 | + 'cart_empty_text' => 'fluentform_sanitize_html', | |
| 178 | 201 | ]; |
| 179 | - | |
| 180 | 202 | |
| 181 | 203 | $settingsKeys = array_keys($settingsMap); |
| 182 | 204 | |
| 183 | 205 | $stylePrefMap = [ |
| @@ -185,12 +207,17 @@ | ||
| 185 | 207 | 'media' => 'sanitize_url', |
| 186 | 208 | 'alt_text' => 'sanitize_text_field', |
| 187 | 209 | ]; |
| 188 | 210 | $stylePrefKeys = array_keys($stylePrefMap); |
| 189 | - | |
| 211 | + | |
| 190 | 212 | foreach ($fields as $fieldIndex => &$field) { |
| 191 | 213 | $element = Arr::get($field, 'element'); |
| 192 | - | |
| 214 | + | |
| 215 | + // Must stay above the element branching: containers return early yet still render their attributes. | |
| 216 | + if (!empty($field['attributes'])) { | |
| 217 | + $fields[$fieldIndex]['attributes'] = $this->dropEventHandlerAttributeKeys($field['attributes']); | |
| 218 | + } | |
| 219 | + | |
| 193 | 220 | if ('container' == $element) { |
| 194 | 221 | $columns = $field['columns']; |
| 195 | 222 | foreach ($columns as $columnIndex => $column) { |
| 196 | 223 | $fields[$fieldIndex]['columns'][$columnIndex]['fields'] = $this->sanitizeFieldMaps($column['fields']); |
| @@ -244,11 +271,10 @@ | ||
| 244 | 271 | $field['settings']['button_ui']['img_url'] = esc_url_raw($buttonUi['img_url']); |
| 245 | 272 | } |
| 246 | 273 | } |
| 247 | 274 | } |
| 248 | - | |
| 249 | 275 | |
| 250 | - if (!empty($field['attributes'])) { | |
| 276 | + if (!empty($field['attributes']) && is_array($field['attributes'])) { | |
| 251 | 277 | $attributes = array_filter(Arr::only($field['attributes'], $attributesKeys)); |
| 252 | 278 | |
| 253 | 279 | foreach ($attributes as $key => $value) { |
| 254 | 280 | $fields[$fieldIndex]['attributes'][$key] = call_user_func($attributesMap[$key], $value); |
| @@ -255,9 +281,9 @@ | ||
| 255 | 281 | } |
| 256 | 282 | } |
| 257 | 283 | |
| 258 | 284 | if (!empty($field['settings'])) { |
| 259 | - $settings = array_filter(Arr::only($field['settings'], array_values($settingsKeys))); | |
| 285 | + $settings = Arr::only($field['settings'], array_values($settingsKeys)); | |
| 260 | 286 | foreach ($settings as $key => $value) { |
| 261 | 287 | $fields[$fieldIndex]['settings'][$key] = call_user_func($settingsMap[$key], $value); |
| 262 | 288 | } |
| 263 | 289 | } |
| @@ -267,9 +293,9 @@ | ||
| 267 | 293 | if (!empty($field['fields'])) { |
| 268 | 294 | $fields[$fieldIndex]['fields'] = $this->sanitizeFieldMaps($field['fields']); |
| 269 | 295 | continue; |
| 270 | 296 | } |
| 271 | - | |
| 297 | + | |
| 272 | 298 | if (!empty($field['style_pref'])) { |
| 273 | 299 | $settings = array_filter(Arr::only($field['style_pref'], $stylePrefKeys)); |
| 274 | 300 | |
| 275 | 301 | foreach ($settings as $key => $value) { |
| @@ -275,9 +301,9 @@ | ||
| 275 | 301 | foreach ($settings as $key => $value) { |
| 276 | 302 | $fields[$fieldIndex]['style_pref'][$key] = call_user_func($stylePrefMap[$key], $value); |
| 277 | 303 | } |
| 278 | 304 | } |
| 279 | - | |
| 305 | + | |
| 280 | 306 | $validationRules = Arr::get($field, 'settings.validation_rules'); |
| 281 | 307 | if (!empty($validationRules)) { |
| 282 | 308 | foreach ($validationRules as $key => $rule) { |
| 283 | 309 | if (isset($rule['message'])) { |
| @@ -287,12 +313,84 @@ | ||
| 287 | 313 | } |
| 288 | 314 | } |
| 289 | 315 | } |
| 290 | 316 | } |
| 291 | - | |
| 317 | + | |
| 292 | 318 | return $fields; |
| 293 | 319 | } |
| 294 | 320 | |
| 321 | + private function sanitizeRepeatLimit($value) | |
| 322 | + { | |
| 323 | + if (!is_scalar($value) || '' === trim((string) $value)) { | |
| 324 | + return ''; | |
| 325 | + } | |
| 326 | + | |
| 327 | + return absint($value); | |
| 328 | + } | |
| 329 | + | |
| 330 | + private function sanitizeDisplayMode($value) | |
| 331 | + { | |
| 332 | + $value = is_scalar($value) ? sanitize_key((string) $value) : ''; | |
| 333 | + | |
| 334 | + return in_array($value, ['accordion', 'tabs'], true) ? $value : 'accordion'; | |
| 335 | + } | |
| 336 | + | |
| 337 | + private function sanitizeClassSetting($value) | |
| 338 | + { | |
| 339 | + return is_scalar($value) ? sanitize_html_class((string) $value) : ''; | |
| 340 | + } | |
| 341 | + | |
| 342 | + private function sanitizePricingOptionImages($options) | |
| 343 | + { | |
| 344 | + if (!is_array($options)) { | |
| 345 | + return []; | |
| 346 | + } | |
| 347 | + | |
| 348 | + foreach ($options as &$option) { | |
| 349 | + if (!is_array($option)) { | |
| 350 | + continue; | |
| 351 | + } | |
| 352 | + | |
| 353 | + if (array_key_exists('label', $option)) { | |
| 354 | + $label = $option['label']; | |
| 355 | + $option['label'] = is_scalar($label) ? fluentform_sanitize_html((string) $label) : ''; | |
| 356 | + } | |
| 357 | + | |
| 358 | + if (array_key_exists('image', $option)) { | |
| 359 | + $image = $option['image']; | |
| 360 | + $option['image'] = is_scalar($image) ? esc_url_raw((string) $image) : ''; | |
| 361 | + } | |
| 362 | + } | |
| 363 | + unset($option); | |
| 364 | + | |
| 365 | + return $options; | |
| 366 | + } | |
| 367 | + | |
| 368 | + private function sanitizeSubscriptionOptions($options) | |
| 369 | + { | |
| 370 | + if (!is_array($options)) { | |
| 371 | + return []; | |
| 372 | + } | |
| 373 | + | |
| 374 | + foreach ($options as &$option) { | |
| 375 | + if (!is_array($option)) { | |
| 376 | + continue; | |
| 377 | + } | |
| 378 | + | |
| 379 | + foreach (['name', 'user_input_label'] as $labelKey) { | |
| 380 | + if (!array_key_exists($labelKey, $option)) { | |
| 381 | + continue; | |
| 382 | + } | |
| 383 | + | |
| 384 | + $label = $option[$labelKey]; | |
| 385 | + $option[$labelKey] = is_scalar($label) ? fluentform_sanitize_html((string) $label) : ''; | |
| 386 | + } | |
| 387 | + } | |
| 388 | + unset($option); | |
| 389 | + | |
| 390 | + return $options; | |
| 391 | + } | |
| 392 | + | |
| 295 | 393 | private function updatePrimaryEmail($form) |
| 296 | 394 | { |
| 297 | 395 | $emailInputs = FormFieldsParser::getElement($form, ['input_email'], ['element', 'attributes']); |
| 298 | 396 | |
| @@ -304,9 +402,9 @@ | ||
| 304 | 402 | } |
| 305 | 403 | |
| 306 | 404 | FormMeta::persist($form->id, '_primary_email_field', $emailInputName); |
| 307 | 405 | } |
| 308 | - | |
| 406 | + | |
| 309 | 407 | private function sanitizeCustomSubmit($fields) |
| 310 | 408 | { |
| 311 | 409 | $customSubmitSanitizationMap = [ |
| 312 | 410 | 'hover_styles' => [ |
| @@ -313,9 +411,9 @@ | ||
| 313 | 411 | 'backgroundColor' => [$this, 'sanitizeRgbColor'], |
| 314 | 412 | 'borderColor' => [$this, 'sanitizeRgbColor'], |
| 315 | 413 | 'color' => [$this, 'sanitizeRgbColor'], |
| 316 | 414 | 'borderRadius' => 'sanitize_text_field', |
| 317 | - 'minWidth' => [$this, 'sanitizeMinWidth'] | |
| 415 | + 'minWidth' => [$this, 'sanitizeMinWidth'], | |
| 318 | 416 | ], |
| 319 | 417 | 'normal_styles' => [ |
| 320 | 418 | 'backgroundColor' => [$this, 'sanitizeRgbColor'], |
| 321 | 419 | 'borderColor' => [$this, 'sanitizeRgbColor'], |
| @@ -320,9 +418,9 @@ | ||
| 320 | 418 | 'backgroundColor' => [$this, 'sanitizeRgbColor'], |
| 321 | 419 | 'borderColor' => [$this, 'sanitizeRgbColor'], |
| 322 | 420 | 'color' => [$this, 'sanitizeRgbColor'], |
| 323 | 421 | 'borderRadius' => 'sanitize_text_field', |
| 324 | - 'minWidth' => [$this, 'sanitizeMinWidth'] | |
| 422 | + 'minWidth' => [$this, 'sanitizeMinWidth'], | |
| 325 | 423 | ], |
| 326 | 424 | 'button_ui' => [ |
| 327 | 425 | 'type' => 'sanitize_text_field', |
| 328 | 426 | 'text' => 'fluentform_sanitize_html', |
| @@ -330,9 +428,9 @@ | ||
| 330 | 428 | ], |
| 331 | 429 | ]; |
| 332 | 430 | foreach ($fields as $fieldIndex => $field) { |
| 333 | 431 | $element = Arr::get($field, 'element'); |
| 334 | - | |
| 432 | + | |
| 335 | 433 | if ('custom_submit_button' == $element) { |
| 336 | 434 | $styleAttr = ['hover_styles', 'normal_styles', 'button_ui']; |
| 337 | 435 | foreach ($styleAttr as $attr) { |
| 338 | 436 | if ($styleConfigs = Arr::get($field, 'settings.' . $attr)) { |
| @@ -343,10 +441,9 @@ | ||
| 343 | 441 | } |
| 344 | 442 | } |
| 345 | 443 | } |
| 346 | 444 | } |
| 347 | - } | |
| 348 | - elseif ('container' == $element) { | |
| 445 | + } elseif ('container' == $element) { | |
| 349 | 446 | $columns = $field['columns']; |
| 350 | 447 | foreach ($columns as $columnIndex => $column) { |
| 351 | 448 | $fields[$fieldIndex]['columns'][$columnIndex]['fields'] = $this->sanitizeCustomSubmit($column['fields']); |
| 352 | 449 | } |
| @@ -355,8 +452,27 @@ | ||
| 355 | 452 | } |
| 356 | 453 | return $fields; |
| 357 | 454 | } |
| 358 | 455 | |
| 456 | + /** | |
| 457 | + * An `on*` key renders as a live event handler, and every attribute map here is | |
| 458 | + * sanitized by value against keys it already knows — never by key. | |
| 459 | + */ | |
| 460 | + private function dropEventHandlerAttributeKeys($attributes) | |
| 461 | + { | |
| 462 | + if (!is_array($attributes)) { | |
| 463 | + return $attributes; | |
| 464 | + } | |
| 465 | + | |
| 466 | + foreach (array_keys($attributes) as $attributeKey) { | |
| 467 | + if (!Helper::isSafeAttributeKey($attributeKey)) { | |
| 468 | + unset($attributes[$attributeKey]); | |
| 469 | + } | |
| 470 | + } | |
| 471 | + | |
| 472 | + return $attributes; | |
| 473 | + } | |
| 474 | + | |
| 359 | 475 | private function sanitizeStepsWrapper($stepWrapper) |
| 360 | 476 | { |
| 361 | 477 | $stepsSanitizationMap = [ |
| 362 | 478 | 'prev_btn' => [ |
| @@ -368,9 +484,9 @@ | ||
| 368 | 484 | |
| 369 | 485 | foreach ($stepWrapper as $fieldIndex => $field) { |
| 370 | 486 | $element = Arr::get($field, 'element'); |
| 371 | 487 | |
| 372 | - if ($element === 'step_start' || $element === 'step_end') { | |
| 488 | + if ('step_start' === $element || 'step_end' === $element) { | |
| 373 | 489 | if (!empty($field['settings']['step_titles']) && is_array($field['settings']['step_titles'])) { |
| 374 | 490 | foreach ($field['settings']['step_titles'] as $index => $title) { |
| 375 | 491 | $field['settings']['step_titles'][$index] = fluentform_sanitize_html($title); |
| 376 | 492 | } |
| @@ -392,9 +508,9 @@ | ||
| 392 | 508 | $field['settings']['prev_btn'][$key] = $sanitizeFunction($value); |
| 393 | 509 | } |
| 394 | 510 | } |
| 395 | 511 | } |
| 396 | - | |
| 512 | + | |
| 397 | 513 | if (!empty($field['attributes']['class'])) { |
| 398 | 514 | $field['attributes']['class'] = sanitize_text_field($field['attributes']['class']); |
| 399 | 515 | } |
| 400 | 516 | if (!empty($field['attributes']['id'])) { |
| @@ -401,12 +517,16 @@ | ||
| 401 | 517 | $field['attributes']['id'] = sanitize_text_field($field['attributes']['id']); |
| 402 | 518 | } |
| 403 | 519 | } |
| 404 | 520 | |
| 405 | - if ($element === 'step_start' && isset($field['fields'])) { | |
| 521 | + if ('step_start' === $element && isset($field['fields'])) { | |
| 406 | 522 | $field['fields'] = $this->sanitizeStepsWrapper($field['fields']); |
| 407 | 523 | } |
| 408 | 524 | |
| 525 | + if (!empty($field['attributes'])) { | |
| 526 | + $field['attributes'] = $this->dropEventHandlerAttributeKeys($field['attributes']); | |
| 527 | + } | |
| 528 | + | |
| 409 | 529 | $stepWrapper[$fieldIndex] = $field; |
| 410 | 530 | } |
| 411 | 531 | |
| 412 | 532 | return $stepWrapper; |
| @@ -418,12 +538,28 @@ | ||
| 418 | 538 | return $value; |
| 419 | 539 | } |
| 420 | 540 | return ''; |
| 421 | 541 | } |
| 422 | - | |
| 423 | - public function sanitizeRgbColor($value) { | |
| 424 | - if (preg_match('/^rgba?\((\d{1,3}\s*,\s*){2,3}(0|1|0?\.\d+)\)$/', $value)) { | |
| 542 | + | |
| 543 | + public function sanitizeRgbColor($value) | |
| 544 | + { | |
| 545 | + if (!is_string($value)) { | |
| 546 | + return ''; | |
| 547 | + } | |
| 548 | + | |
| 549 | + // rgb() takes three 0-255 channels; rgba() takes those plus an alpha. | |
| 550 | + // A single combined pattern cannot express that, and treating the last | |
| 551 | + // component as an alpha in both cases discarded every rgb() whose blue | |
| 552 | + // channel was not 0 or 1 - white included. | |
| 553 | + $channel = '\s*(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\s*'; | |
| 554 | + $alpha = '\s*(?:0|1|0?\.[0-9]+|1\.0+)\s*'; | |
| 555 | + | |
| 556 | + $rgb = '/^rgb\(' . $channel . ',' . $channel . ',' . $channel . '\)$/'; | |
| 557 | + $rgba = '/^rgba\(' . $channel . ',' . $channel . ',' . $channel . ',' . $alpha . '\)$/'; | |
| 558 | + | |
| 559 | + if (preg_match($rgb, $value) || preg_match($rgba, $value)) { | |
| 425 | 560 | return $value; |
| 426 | 561 | } |
| 562 | + | |
| 427 | 563 | return ''; |
| 428 | 564 | } |
| 429 | 565 | } |
