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PHP Manual :: preg_last_error



preg_grep || preg_match_all || PCRE Functions || PHP Manual

(PHP 5 >= 5.2.0, PHP 7)

preg_last_errorReturns 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)
  • PREG_JIT_STACKLIMIT_ERROR (since PHP 7.0.0)



preg_grep || preg_match_all || PCRE Functions || PHP Manual
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