Re: help! strange preg_match no match problem!

On Fri, 27 Jun 2008 09:23:46 -0700 (PDT), Happy Face wrote:
Hi, All,
I encountered this strange problem while using function preg_match.
The following is the php code.
when I set the line:
$text = str_repeat('*', 12500);

preg_match will return 0 for the hard coded regular expression.

but if I set $text to 12499, it will return 1 for a match.
$text = str_repeat('*', 12499);

anybody know what's the problem?

Thanks!


</p>match result
<?php
$text = str_repeat('*', 12500);
$regexp = "/ ( . *? ) ( ($)|(~(?: [[:alnum:]]+ | .))|(\#? \[ .*? [^]
\s] .*? \]) ) /Asx";

if($text and $regexp)
$ret = preg_match($regexp, $text, $m);

echo $ret;
?> <br />

</p>regexp is <?php echo $regexp; ?> <br />
</p>text length <?php echo strlen($text) ?> <br>
<?php echo "count ".count($m)."<br>";
for ($i=0; $i<count($m); $i++) {
$str=$i.htmlentities($m[$i])."<br>";
echo $str;
} ?> <br />

Can't replicate. I get hits regardless of length:

$ cat foo.php
<?php
$text = str_repeat('*', 12499);
$regexp = "/ ( . *? ) ( ($)|(~(?: [[:alnum:]]+ | .))|(\#? \[ .*? [^]\s] .*? \]) ) /Asx";

if($text and $regexp)
$ret = preg_match($regexp, $text, $m);

echo "$ret\n";
?>
$ php foo.php
1
$ cat foo1.php
<?php
$text = str_repeat('*', 12500);
$regexp = "/ ( . *? ) ( ($)|(~(?: [[:alnum:]]+ | .))|(\#? \[ .*? [^]\s] .*? \]) ) /Asx";

if($text and $regexp)
$ret = preg_match($regexp, $text, $m);

echo "$ret\n";
?>
$ php foo1.php
1
$

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.

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