Bug #52265 [Opn->Bgs]: Defaulting a class-function-param to 0 makes an IF see it as true when comparin

From: Date: Tue, 06 Jul 2010 15:17:42 +0000
Subject: Bug #52265 [Opn->Bgs]: Defaulting a class-function-param to 0 makes an IF see it as true when comparin
References: 1  Groups: php.bugs 
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Edit report at http://bugs.php.net/bug.php?id=52265&edit=1

 ID:               52265
 Updated by:       johannes@php.net
 Reported by:      weer1 at gmx dot net
 Summary:          Defaulting a class-function-param to 0 makes an IF see
                   it as true when comparin
-Status:           Open
+Status:           Bogus
 Type:             Bug
 Package:          Scripting Engine problem
 Operating System: Linux
 PHP Version:      5.2.13

 New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php

See http://php.net/manual/en/types.comparisons.php


Previous Comments:
------------------------------------------------------------------------
[2010-07-06 16:42:20] weer1 at gmx dot net

Description:
------------
Defaulting a class-function-param to 0 makes an IF see it as true when
comparing it to a string.

	function fillSelectBox($selected = 0)
	{
		$txt = '';

		$obj = new RetailerCountry();
		$objs = $obj->getAll();
		foreach ($objs as $ob)
		{
			$id = $ob->getAttrib('retailercountry');
			$name = $ob->getAttrib('retailercountry');

			$txt .= $ob->getAttrib('retailercountry');

			echo 'i:'.$id;
			echo 's:'.$selected;

			if ($id == $selected)
			{
				$txt .= ' * ';
			}
			$txt .= '<br>';
		}

		return $txt;
	}

The result for this function is: every word that's displayed gets a star
*.
This changes when I change the input param to $selected = ''.

But did or does PHP every care about this? I don't to do some kind of
strict typing!

Regards
MD


Test script:
---------------
	function fillSelectBox($selected = 0)
	{
		$txt = '';

		$obj = new RetailerCountry();
		$objs = $obj->getAll();
		foreach ($objs as $ob)
		{
			$id = $ob->getAttrib('retailercountry');
			$name = $ob->getAttrib('retailercountry');

			$txt .= $ob->getAttrib('retailercountry');

			echo 'i:'.$id;
			echo 's:'.$selected;

			if ($id == $selected)
			{
				$txt .= ' * ';
			}
			$txt .= '<br>';
		}
		return $txt;
	}


Expected result:
----------------
The result for this function is: every word that's displayed gets a star
*.
This changes when I change the input param to $selected = ''.

But did or does PHP every care about this? I don't to do some kind of
strict typing!



------------------------------------------------------------------------



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Edit this bug report at http://bugs.php.net/bug.php?id=52265&edit=1

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