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Bug #5198 inequality test (!=) failure
Submitted: 2000-06-23 05:43 UTC Modified: 2000-07-18 10:08 UTC
From: fharvell at fts dot net Assigned:
Status: Closed Package: Misbehaving function
PHP Version: 4.0.0 Release OS: RedHat Linux 6.2
Private report: No CVE-ID: None
 [2000-06-23 05:43 UTC] fharvell at fts dot net
The inequality test (!= or <>) fails to indicate an inequality when comparing an array with a string.  (Note that this also is incorrect in PHP 3.0.12.)

The following script illustrates this:

----- cut -----
$val = array("Test Array");
$str = "Test String";

print("<br>\$val:<pre>"); var_dump($val); print("</pre><br>");
print("<br>\$str:<pre>"); var_dump($str); print("</pre><br>");

if ($val == $str) {
  print("<br>\"$val\" == \"$str\" is true and incorrect<br>");
} else {
  print("<br>\"$val\" == \"$str\" is false and correct<br>");
}

if ($val != $str) {
  print("<br>\"$val\" != \"$str\" is true and correct <br>");
} else {
  print("<br>\"$val\" != \"$str\" is false and incorrect<br>");
}
----- cut -----

When the above is executed, it produces the following incorrect result:

----- cut -----
$val:

array(1) {
  [0]=>
  string(10) "Test Array"
}



$str:

string(11) "Test String"



"Array" == "Test String" is false and correct

"Array" != "Test String" is false and incorrect
----- cut -----

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 [2000-06-24 02:07 UTC] stas at cvs dot php dot net
Failed to reproduce this. Please provide more info.
 [2000-07-18 10:07 UTC] stas at cvs dot php dot net
no user feedback
 [2000-07-18 10:08 UTC] stas at cvs dot php dot net
close. 
 
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