Multiple strpos for a needle ni haystack not first

brooky

The following code works to pull out a bit of anf html page into a variable:

$filename = $HTTP_SERVER_VARS['DOCUMENT_ROOT']."/eflyers/templates/".$HTTP_GET_VARS['template'];
$handle = fopen($filename, "r");
$html = fread($handle, filesize($filename));
fclose($handle);

$findStartMulti = strpos ($html, "[MULTI(n)]");
$findEndMulti  = strpos ($html, "[/MULTI]");

$end = $findEndMulti - $findStartMulti;
$data = substr($html, $findStartMulti+10, $end-10);

echo "Variable data= ".$data."<br>";

My problem is that this just pulls out the first?

How can I make it do this to for multiple search results and not just the first?!? 🙂

drew010

strpos also takes an option third argument called offset so you can specify where strpos should start looking. you can run a loop and every time it runs through you can set a variable offset to $findEndMulti.
so you could have something like this:

$offset = 0;
while(($findStartMulti = strpos($html, "[MULTI(n)]", $offset)) !== FALSE) {
$findEndMulti = strpos ($html, "[/MULTI]", $offset);

$end = $findEndMulti - $findStartMulti; 
$data = substr($html, $findStartMulti+10, $end-10); 

echo "Variable data= ".$data."<br>";
$offset = $findEndMulti;

}

see if that does the trick. i was not able to test at the moment because im in a comp class.

brooky

Marvellous! I shal give that a try and importantly try understand how it works to learn!!

brooky

It seemed to make a never ending loop. 🙁

Maybe I can tweak it.

p.s. This is for an email template system for the charity http://www.globalideasbank.org

drew010

in case you didnt get it working i modified it so it works, here is the code i used to test it:

<?php
$html = <<<EOD
this is a test
[MULTI(n)]first tag[/MULTI]blahblah
fdsfsdfsafsdfasdf
fdsfs[MULTI(n)]second tag[/MULTI]blfsdfssd
fsdkljfsd[MULTI(n)]third tag[/MULTI]
fsdfsdfsd
[MULTI(n)]last tag[/MULTI]
EOD;

$offset = 0;
while(($findStartMulti = strpos($html, "[MULTI(n)]", $offset)) !== FALSE) {
	$findEndMulti = strpos ($html, "[/MULTI]", $offset);

$beg = $findStartMulti + 10;

$len = $findEndMulti - $beg;

$data = substr($html, $beg, $len);

echo "Variable data= ".$data."<br>";

$offset = $findEndMulti + 8;
} 


?>

the output of it was:
Variable data= first tag
Variable data= second tag
Variable data= third tag
Variable data= last tag