(PHP 8)
preg_last_error_msg — 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.
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：
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