(PHP 8)
preg_last_error_msg — Returns the error message of the last PCRE regex execution
Returns the error message of the last PCRE regex execution.
此函数没有参数。
Returns the error message on success, or "No error" if no
error has occurred.
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