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93 lines
2.3 KiB
93 lines
2.3 KiB
2 years ago
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<?php
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declare(strict_types=1);
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namespace PhpMyAdmin\Utils;
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use function strtolower;
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use function strtoupper;
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use function substr;
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use function version_compare;
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final class ForeignKey
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{
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/**
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* Verifies if this table's engine supports foreign keys
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*
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* @param string $engine engine
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*/
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public static function isSupported($engine): bool
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{
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global $dbi;
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$engine = strtoupper((string) $engine);
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if (($engine === 'INNODB') || ($engine === 'PBXT')) {
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return true;
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}
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if ($engine === 'NDBCLUSTER' || $engine === 'NDB') {
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$ndbver = strtolower(
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$dbi->fetchValue('SELECT @@ndb_version_string') ?: ''
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);
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if (substr($ndbver, 0, 4) === 'ndb-') {
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$ndbver = substr($ndbver, 4);
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}
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return version_compare($ndbver, '7.3', '>=');
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}
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return false;
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}
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/**
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* Is Foreign key check enabled?
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*/
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public static function isCheckEnabled(): bool
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{
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global $dbi;
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if ($GLOBALS['cfg']['DefaultForeignKeyChecks'] === 'enable') {
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return true;
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}
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if ($GLOBALS['cfg']['DefaultForeignKeyChecks'] === 'disable') {
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return false;
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}
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return $dbi->getVariable('FOREIGN_KEY_CHECKS') === 'ON';
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}
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/**
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* Handle foreign key check request
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*/
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public static function handleDisableCheckInit(): bool
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{
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global $dbi;
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$defaultCheckValue = $dbi->getVariable('FOREIGN_KEY_CHECKS') === 'ON';
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if (isset($_REQUEST['fk_checks'])) {
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if (empty($_REQUEST['fk_checks'])) {
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// Disable foreign key checks
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$dbi->setVariable('FOREIGN_KEY_CHECKS', 'OFF');
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} else {
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// Enable foreign key checks
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$dbi->setVariable('FOREIGN_KEY_CHECKS', 'ON');
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}
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}
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return $defaultCheckValue;
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}
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/**
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* Cleanup changes done for foreign key check
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*
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* @param bool $defaultCheckValue original value for 'FOREIGN_KEY_CHECKS'
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*/
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public static function handleDisableCheckCleanup(bool $defaultCheckValue): void
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{
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global $dbi;
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$dbi->setVariable('FOREIGN_KEY_CHECKS', $defaultCheckValue ? 'ON' : 'OFF');
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}
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}
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