<?php if (!function_exists('get_error_handler')) { function noop_error_handler() { } function get_error_handler(): ?callable { $handler = set_error_handler('noop_error_handler'); restore_error_handler(); return $handler; } } $handler = function (int $errno, string $errstr, ?string $errfile, ?int $errline) { echo "Error: " . $errstr . "\n"; }; var_dump(get_error_handler()); // NULL set_error_handler($handler); var_dump(get_error_handler() === $handler); // bool(true) $new_handler = function (int $errno, string $errstr, ?string $errfile, ?int $errline) { echo "Error: " . $errstr . "\n"; }; var_dump(get_error_handler()); // NULL set_error_handler($new_handler); var_dump(get_error_handler() === $new_handler); // bool(true)
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