0 == true PHP5 bug =)

[sde]

funny thing i ran into today. i have a function something like this:

PHP Code:

<?
function checkthis( $var ){
  if( $var == 'abcdefg' ){
    return 'is equal';
  }else{
    return 'is not equal';
  }
}

echo checkthis( 0 );
?>

this outputs: is equal in PHP 5.0.3, .. apparently it works in version 5.0.2 ( i found a bug report ) but is still broken in beta 5.1.

it only is a problem with the integer value of 0. if you put quotes around the 0 when sending it into the function, it works as expected.

[redhead]

It must be the == operators comparison against NULL that this one fails at.

[sde]

after a little more research i found that in PHP5, strings evaluate to 0 when compared to an int.

to me, this doesn't make sense. i think they should leave it as it was in PHP4, and cast 0 to a string and then compare.