preg_last_error
PHP 5 >= 5.2.0, PHP 7, PHP 8
preg_last_error - Returns the error code of the last PCRE regex execution
Manual
preg_last_error(
Returns the error code of the last PCRE regex execution.
preg_last_error example
<?php
preg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar');
if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) {
echo 'Backtrack limit was exhausted!';
}
?>
The above example will output:
Backtrack limit was exhausted!
Parameters
This function has no parameters.
Return Values
Returns one of the following constants (explained on their own page): PREG_NO_ERROR PREG_INTERNAL_ERROR PREG_BACKTRACK_LIMIT_ERROR (see also pcre.backtrack_limit) PREG_RECURSION_LIMIT_ERROR (see also pcre.recursion_limit) PREG_BAD_UTF8_ERROR PREG_BAD_UTF8_OFFSET_ERROR PREG_JIT_STACKLIMIT_ERROR