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SqlCommentTrait.php
50 lines
| 1 | <?php |
| 2 | |
| 3 | namespace WPStaging\Framework\Traits; |
| 4 | |
| 5 | /** |
| 6 | * Provides helpers to identify SQL lines during database file extraction. |
| 7 | * Used to filter out non-SQL content such as backup index data from extracted SQL files. |
| 8 | * |
| 9 | * Also used in wpstg-restore standalone tool (src/wpstg-restore/src/classes/Extractor.php). |
| 10 | */ |
| 11 | trait SqlCommentTrait |
| 12 | { |
| 13 | /** |
| 14 | * Check if a line is a SQL comment or empty/whitespace-only. |
| 15 | */ |
| 16 | protected function isSqlCommentOrEmpty(string $line): bool |
| 17 | { |
| 18 | $trimmed = trim($line); |
| 19 | if ($trimmed === '' || $this->isLineBreakOnly($trimmed)) { |
| 20 | return true; |
| 21 | } |
| 22 | |
| 23 | $first2Chars = substr($trimmed, 0, 2); |
| 24 | return $first2Chars === '--' || strpos($trimmed, '#') === 0 || $first2Chars === '/*'; |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Check if a line is a valid SQL statement (ends with semicolon). |
| 29 | */ |
| 30 | protected function isSqlStatement(string $line): bool |
| 31 | { |
| 32 | $trimmed = trim($line); |
| 33 | return $trimmed !== '' && substr($trimmed, -1) === ';'; |
| 34 | } |
| 35 | |
| 36 | /** |
| 37 | * Check if a line is valid SQL content (statement, comment, or empty). |
| 38 | * Used to filter out backup index data from extracted database files. |
| 39 | */ |
| 40 | protected function isSqlContent(string $line): bool |
| 41 | { |
| 42 | return $this->isSqlCommentOrEmpty($line) || $this->isSqlStatement($line); |
| 43 | } |
| 44 | |
| 45 | private function isLineBreakOnly(string $string): bool |
| 46 | { |
| 47 | return empty($string) || in_array($string, ["\r", "\n", "\r\n", "\n\r", chr(13), chr(10), PHP_EOL]); |
| 48 | } |
| 49 | } |
| 50 |