[SOLVED] Preg match not picking this string up.

[c_shelswell]

Hi I have a preg_match search that i'm now getting quite lost with. It should be pretty simple i'm checking bounced mails looking for the string:

 

"A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:"

 

in the following:

 

This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: email@email.com The mail server could not deliver mail to email@email.com. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. ------ This is a copy of the message, including all the headers. ------ Return-path:

 

my code is:

 

foreach ($delErrors as $key => $value)
{
	$permError = "/".$value['string']."/";

	if (preg_match($permError, $dtls['msg_body'], $found))
	{
		// Finds a message with an error
		$errorType = $value['delivery_error_type'];
	}
	elseif (preg_match($permError, $dtls['subject'], $found))
	{
		$errorType = $value['delivery_error_type'];
	}
}

 

i can't seem to get it to find the string at all. However if i shorten the search string to only "This is a permanent error." it works fine. Is there any reason why this might be happening?

 

Many thanks

[effigy]

Try passing $value['string'] through preg_quote.

[c_shelswell]

Cheers, I'm still not having much joy though. I've updated the code to the below:

 

foreach ($delErrors as $key => $value)
{
	$permError = preg_quote("/".$value['string']."/");
	$mBody = preg_quote($dtls['msg_body'], "/");

	if (preg_match($permError, $mBody, $found))
	{
		// Finds a message with an error
		$errorType = $value['delivery_error_type'];
	}
	elseif (preg_match($permError, $dtls['subject'], $found))
	{
		$errorType = $value['delivery_error_type'];
	}

}

 

and it still doesn't seem to find anything. Any more ideas?

 

Many thanks

[effigy]

preg_quote should only be used to escape the content, not the delimiters. Therefore, preg_quote("/".$value['string']."/"); should be preg_quote($value['string'], '/');.

[c_shelswell]

if i do that i then get the error message:

 

"Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in"

 

code is

$permError = preg_quote('A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.', '/');

$mBody = preg_quote($dtls['msg_body'], "/");

if (preg_match($permError, $mBody, $found))
{
// Finds a message with an error
$errorType = $value['delivery_error_type'];
}

 

Many thanks for your help!

[effigy]

"Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in"

 

Precisely. You need delimiters.

[c_shelswell]

sorry to be a real pain i've been googling this for a bit now and i'm still really stuck. I've got it down to the fullstop at the end of the sentence

 

"This message was created automatically by mail delivery software."

 

if i add anything after the fullstop i can't get the preg_match to work. I've tried preg_quote and adding the backslashes in manually but i'm still not winning.

 

Thanks for your help, it's very appreciated.

[effigy]

Every preg expression requires delimiters. You had them, but you were escaping them, which was incorrect because they were being considered as part of the content, thus: not delimiters. After the content has been escaped (made regex-safe), the delimiters need to be reapplied.

 

if (preg_match($permError should be if (preg_match("/$permError/".

 

A working example:

 

<pre>
<?php
$content = 'This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: email@email.com The mail server could not deliver mail to email@email.com. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. ------ This is a copy of the message, including all the headers. ------ Return-path:';
$look_for = 'A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:';
echo preg_match('/' . preg_quote($look_for, '/') . '/', $content) ? 'Matched' : 'Did Not Match';
?>
</pre>

[c_shelswell]

Brilliant - thanks very much for your help got it working!!