preg_greppreg_last_error
(PHP 5 >= 5.2.0)
preg_last_error — Returns the error code of the last PCRE regex execution
Description
int preg_last_error
( void
)
Returns the error code of the last PCRE regex execution.
Example #1 preg_last_error() example
<?php
preg_match('/(?:\D+|<\d+>)*[!?]/', 'foobar foobar foobar');
if (preg_last_error() == PREG_BACKTRACK_LIMIT_ERROR) {
print 'Backtrack limit was exhausted!';
}
?>
The above example will output:
Backtrack limit was exhausted!
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 (since PHP 5.3.0)
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