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preg_last_error_msg

(PHP 8)

preg_last_error_msg — Returns the error message of the last PCRE regex execution

说明

preg_last_error_msg(): string

Returns the error message of the last PCRE regex execution.

参数

此函数没有参数。

返回值

Returns the error message on success, or "No error" if no error has occurred.

示例

示例 #1 preg_last_error_msg() example

<?php

preg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar');

if (preg_last_error() !== PREG_NO_ERROR) {
echo preg_last_error_msg();
}

?>

以上示例会输出：

Backtrack limit exhausted

参见