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preg_last_error_msg

(PHP 8)

preg_last_error_msgReturns 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.

范例

Example #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();
}

?>

以上例程会输出:

Backtrack limit exhausted

参见

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