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Bug #25740 strstr unexpected behavior
Submitted: 2003-10-03 01:49 UTC Modified: 2003-10-03 23:56 UTC
From: daijoubu at videotron dot ca Assigned:
Status: Not a bug Package: Strings related
PHP Version: 4.3.3 OS: Win98SE
Private report: No CVE-ID: None
 [2003-10-03 01:49 UTC] daijoubu at videotron dot ca
Description:
------------
string strstr ( string haystack, string needle)

If needle is numeric and lenght of 1 at the end of the haystack, returns false

No problem if needle is 'a' ($test = '123456789a') or '90' ($test = '1234567890')

Reproduce code:
---------------
$test = '1234567890';
if (strstr($test, '0'))
{
    $result = 1;
}

Expected result:
----------------
result = 1;

Should output the same as:
if (strpos($test, '0') !== false)
{
    $result = 1;
}

Actual result:
--------------
$result = 0;

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 [2003-10-03 23:56 UTC] sniper@php.net
from the manual page for strstr():
"Returns part of haystack string from the first occurrence of needle to the end of haystack."

strstr() works just fine, the last char in your string is '0' (zero). Try this:

<?php 
$test = '1234567890';
var_dump(strstr($test, '0'));
?>

# php test.php 
string(1) "0"

You see it's string, it's not boolean. 
To get reliable results, always check the type of returned
variable. Like this:

<?php 
  $test = '1234567890';
  if (strstr($test, '0') !== false) {
    $result = 1;
  }
?>

 
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