Greg K — Fri, 05 May 2006 09:52:30 +0000

CptAwesome, your suggestion would work if the strings were the same length, from the post, he wants $var2 (ps :Hello and) to match against $var1 (ps :Hello and welcome to greece)

A direct if ($var2 == $var1) would return false. he would have to do something like:

if ($var2 == substr($var1,0,strlen($var2)))

For the strcmp, I wasn't sure, so I did a test:

<?php
   echo 'v1 vs v2 results in: ' . strcmp($var1,$var2).\"\n\";
   echo 'v3 vs v2 results in: ' . strcmp($var3,$var2).\"\n\";
   echo 'v2 vs v1 results in: ' . strcmp($var2,$var1).\"\n\";
   echo 'v2 vs v3 results in: ' . strcmp($var2,$var3).\"\n\";
?>

gave me this:

Quote: v1 vs v2 results in: 18
v3 vs v2 results in: 1
v2 vs v1 results in: -18
v2 vs v3 results in: -1

So looks like that won't work as both var1 and var3 give the same type fo results (either > 0 or < 0 depending on order give)

-Greg

ablaye — Thu, 04 May 2006 19:57:04 +0000

Try the strcmp function. That's your best bet.

strcmp
(PHP 3, PHP 4, PHP 5)

strcmp -- Binary safe string comparison
Description
int strcmp ( string str1, string str2 )

Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

Note that this comparison is case sensitive.

CptAwesome — Thu, 04 May 2006 16:33:52 +0000

Well, what are you using for matching? ereg? why not do:
if($str == $var1)

== is an exact match...
=== is an exact match and type match

Greg K — Wed, 26 Apr 2006 08:36:26 +0000

What are you currently using to compare the strings?

Try strpos() (see http://www.php.net/strpos for more details)

This worked for me:

<?php
$var1= \"ps :Hello and welcome to greece\";
$var2= \"ps :Hello and\";
$var3= \"ps :It was nice to meeting you\";

if (strpos($var1,$var2)===false)
    echo \"Not Found in Var1 \n\";
else 
    echo \"Was Found in Var1 \n\";
    
if (strpos($var3,$var2)===false)
    echo \"Not Found in Var3 \n\";
else 
    echo \"Was Found in Var3 \n\";
    
?>

-Greg