--TEST--
Test preg_match() function : basic functionality 
--FILE--
<?php
/* 
 *  proto int preg_match(string pattern, string subject [, array subpatterns [, int flags [, int offset]]])
 * Function is implemented in ext/pcre/php_pcre.c
*/
$string = 'Hello, world. [*], this is \ a string';
var_dump(preg_match('/^[hH]ello,\s/', $string, $match1)); //finds "Hello, "
var_dump($match1);
var_dump(preg_match('/l^o,\s\w{5}/', $string, $match2, PREG_OFFSET_CAPTURE)); // tries to find "lo, world" at start of string
var_dump($match2);
var_dump(preg_match('/\[\*\],\s(.*)/', $string, $match3)); //finds "[*], this is \ a string";
var_dump($match3);
var_dump(preg_match('@\w{4}\s\w{2}\s\\\(?:\s.*)@', $string, $match4, PREG_OFFSET_CAPTURE, 14)); //finds "this is \ a string" (with non-capturing parentheses)
var_dump($match4);
var_dump(preg_match('/hello world/', $string, $match5)); //tries to find "hello world" (should be Hello, world)
var_dump($match5);
?>

--EXPECTF--

int(1)
array(1) {
  [0]=>
  string(7) "Hello, "
}
int(0)
array(0) {
}
int(1)
array(2) {
  [0]=>
  string(23) "[*], this is \ a string"
  [1]=>
  string(18) "this is \ a string"
}
int(1)
array(1) {
  [0]=>
  array(2) {
    [0]=>
    string(18) "this is \ a string"
    [1]=>
    int(19)
  }
}
int(0)
array(0) {
}

