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Variërend aantal SELECT boxen

PHP versie: n.v.t.

Javascript: MooTools Framework

Broncode


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Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 106

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Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 119

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 120

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 121

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 199

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 287

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 288

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 289

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 290

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/jorendew/phphulp/inc/class.ubb.php on line 291
Code
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<?php
ini_set
('display_errors''On');
error_reporting(E_ALL);

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>PHPtuts.nl - PHP Snippets - Variërend aantal SELECT boxen</title>
    
    <link rel="stylesheet" href="../../styles/default.css" type="text/css" media="screen" />
    <link rel="stylesheet" href="../../styles/ubb.css" type="text/css" media="screen" />
    <script type="text/javascript" src="../../inc/mootools.js"></script>
    
    <script type="text/javascript">
        var x = 2;
        window.addEvent('domready', function()
        {
            $('cat_1').addEvent('change', getRemoveCat);
        });
        
        /**
        * Functie die bepaalt welke categorieen zichtbaar zijn.
        **/
        function getRemoveCat()
        {
            /**
            * ID bepalen van volgende categorie (== categorie die verandert + 1)
            **/
            next = this.id.split('_')[1].toInt() + 1;
            
            /**
            * Reeds bestaande categorieen verwijderen zodat ze niet in het formulier
            * meegezonden worden.
            **/
            while(x > next)
            {
                x--;
                if($('selects').hasChild($('select_' + x)))
                {
                    $('selects').removeChild($('select_' + x));
                }
            }
            
            /**
            * Geen ajax request verzenden als standaard waarde geselecteerd is.
            **/
            if(this.value == '')
            {
                return false;
            }
            
            /**
            * Ajax request om volgende set categorieen op te halen.
            * Als blijkt dat er geen categorieen meer zijn (responseText == false)
            * dan een submit button weergeven.
            **/
            $('my_form').send(
            {
                onRequest: function () { $('loading').addClass('loading'); },
                onComplete: function(responseText)
                {
                    $('loading').removeClass('loading');
                    if(responseText != 'false')
                    {    
                        // Select creeren en deze functie weer als onChange event meegeven.
                        id = createSelect(responseText);
                        $(id).addEvent('change', getRemoveCat);
                    }
                    else
                    {
                        createSubmit();
                    }
                }
            });
        }
        
        /**
        * Functie voor het creeren van een nieuwe select combinatie.
        * responseText in formaat: key=>value|key=>value|key=>value
        **/
        function createSelect(responseText)
        {
            var id = 'cat_' + x;
            var opts = new Array();
            
            // Verwerken van responseText
            responseText.split('|').each( function(value)
            {
                opts.push(value.split('=>'));
            });
            
            // Creëer nieuw <select> element
            var sel = document.createElement('select');
            sel.id = id;
            sel.name = id;
            
            // Benodigde <option>'s aanmaken en aan de select toevoegen
            opts.each( function(e) 
            { 
                opt = document.createElement('option');
                opt.value = e[0];
                opt.innerHTML = e[1];
                sel.appendChild(opt);
            });
            
            // Label aanmaken                
            var label = document.createElement('label');
            label.setAttribute('for', id);
            label.addClass('field');
            label.innerHTML = 'Categorie ' + x;
            
            // Nieuwe alinea aanmaken en alle elementen aan toevoegen            
            var p = document.createElement('p');
            p.id = 'select_' + x;
            p.appendChild(label);
            p.appendChild(sel);
            
            // Nieuwe alinea toevoegen aan de lijst met <select>'s
            $('selects').appendChild(p);
            
            x++;
            return id;
        }
        
        /**
        * Functie voor het creeren van een submit button.
        **/
        function createSubmit()
        {
            var id = 'select_' + x;
            var input = document.createElement('input');
            input.type = 'submit';
            input.name = 'submit';
            input.value = 'Verzenden';
            
            var p = document.createElement('p');
            p.id = id;
            p.appendChild(input);
            
            $('selects').appendChild(p);
            x++;
            
            /**
            * Melding dat formulier in voorbeeld niet verzonden wordt
            **/
            $(id).addEvent('click', function(e)
            {
                new Event (e).stop();
                alert('In dit voorbeeld is het niet mogelijk om het formulier te verzenden.');
            });
        }
    </script>
</head>
<body>
    <div id="wrap">
        <p class="none small align-right"><a href="/codeSnippets/">&lt;-- Terug naar Snippets</a></p>
        <h1>Variërend aantal SELECT boxen</h1>
        <div id="info">
            <p>PHP versie: n.v.t. </p>
            <p>Javascript: <a href="http://www.phptuts.nl/mootools/mootools.zip" target="_blank">MooTools Framework</a></p>
        </div>
        
        <form id="my_form" action="variabele_dropdown/script.php" method="post">
        <div id="selects">
        <p id="select_1">    
            <label class="field" for="cat_1">Categorie 1</label>
            <select id="cat_1" name="cat_1">
                <option value="" selected="selected">Kies een categorie</option>
                <option value="fruit">Fruit</option>
                <option value="autos">Auto's</option>
            </select>
        </p>
        </div>
        <div id="loading"></div>
        </form>
               
        <?php        
        
// Weergeven broncode
        
define('FILE'__FILE__);
        require_once(
'../broncode.php');
        
?>
    </div>

<!-- Google analytics (geen onderdeel van script) -->
<script type="text/javascript" src="/inc/ga1.js"></script>
<script type="text/javascript" src="/inc/ga2.js"></script>
    
</body>
</html>