asked on

Fatal error: Call to a member function Animate() on a non-object in jquery.php on line 38

getting: Fatal error: Call to a member function Animate() on a non-object in jquery.php on line 38

<?php

class Jquery {

      function animate($trigger, $element, $event, $time) {

            echo "<script>

              $(function() {

                        $('$trigger').$event(function() {

                        $('#$element').slideDown($time);

                        });

                   });

                  </script>";

            ;
      }
}

?>

<?

$trigger= "a";
$element = "paragraph";
$event = "hide";
$time = "500";

$slide = new Jquery();

$slide1->animate($trigger, $element, $event, $time);

?>

<html>

<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>jquery class</title>

</head>

</html>

ASKER CERTIFIED SOLUTION

tsmgeek

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Ray Paseur

I think tsmgeek is on the right track here.

If you add error_reporting(E_ALL) to the top of all your scripts, you will get a notice when you try to use an undefined variable. It will save you from a lot of headscratching over something as simple as a typographical error or a misspelling like this one.

The code snippet shows how to create the error and shows how different error reporting levels can give you different results. You can test it here:
http://www.laprbass.com/RAY_oop_example_2.php

<?php // RAY_oop_example_2.php
error_reporting(E_ALL);
echo "<pre>" . PHP_EOL; // MAKE IT EASY TO READ THE OUTPUT


// DEMONSTRATE HOW PHP HANDLES UNDEFINED VARIABLES (PROPERTIES)
// AND UNDEFINED FUNCTIONS (METHODS) IN OOP NOTATION.
// NOTE HOW DIFFERENT ERROR REPORTING LEVELS WILL CAUSE DIFFERENT OUTPUT
// MAN PAGE http://php.net/manual/en/language.oop5.php


// DEFINE A CLASS OF TEST DATA
class Thing
{
    // DEFINE SOME PROPERTIES
    public $p1, $p2, $p3;

    // DEFINE A CONSTRUCTOR TO SET THE VALUES OF THE PROPERTIES
    public function __construct()
    {
        $this->p1 = 'One';
        $this->p2 = 'Two';
        $this->p3 = 'Three';
    }
}


// INSTANTIATE AN OBJECT FROM THE Thing CLASS
$x = new Thing;
if (is_object($x)) echo PHP_EOL . "X IS AN OBJECT ";


// SHOW THE CONTENTS OF THE OBJECT
var_dump($x);

// ITERATE OVER THE OBJECT
foreach ($x as $property => $value)
{
    echo PHP_EOL . "$property CONTAINS $value";
}


// FOR CONTRAST, CREATE A NON-OBJECT
$y = array();
if (is_array($y)) echo PHP_EOL . "Y IS AN ARRAY ";

// TRY TO ACCESS A PROPERTY OF A NON-OBJECT
echo PHP_EOL . 'HERE IS Y->PROP' . $y->prop;

// SET THE DEFAULT ERROR REPORTING AND TRY IT AGAIN - NO "NOTICE" SHOWS
error_reporting(E_ALL ^ E_NOTICE);
echo PHP_EOL . 'HERE IS Y->PROP' . $y->prop;

// NOW TRY TO ACCESS A METHOD OF A NON-OBJECT
echo PHP_EOL . $y->test();

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