Object return value?

Discussion in 'PHP' started by Robert Johnson, Mar 19, 2011.

0
  1. #1
    Is there some special method or something that can return a value when checking an object?

    For example, say I have an Error class.

    $err = new Error();
    $err->err_number = 102;

    I would like to check something like:
    if ($err) { echo 'Error!'); }
    PHP:
    as oppose to something like:

    if ($err->err_number > 0) { echo 'Error!'); }
//or
if ($err->hasError()) { echo 'Error!'); }
    PHP:
     
    Robert Johnson, Mar 19, 2011 IP
  2. aGor

    aGor Member

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    #2
    Hmm, you could create a __toString() function which will return a string with the error message?

    Like this:
    
<?php
class Error {
    public function __toString()
    {
        return $this->error_msg;
    }
?>
    PHP:
     
    aGor, Mar 19, 2011 IP
  3. ThePHPMaster

    ThePHPMaster Well-Known Member

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    #3
    If err_number if a public variable, you set another variable to it:

    
$err = new Error();
$err->err_number = 102;

$error =& $err->err_number;

if ($error ) { echo 'Error!'); }

unset($error);
// or unset($err->err_number);
if ($error ) { echo 'Error!'); }
    PHP:
     
    ThePHPMaster, Mar 19, 2011 IP
  4. vediovis

    vediovis Peon

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    #4
    try to play with the __construct() , maybe ?
     
    vediovis, Mar 22, 2011 IP