This could be a way using just plain Javascript or jQuery. I prefer the jQuery version, since it separates the click handler from the markup, instead of using inline onclick
handlers, which are in general discouraged.
What this does is use an input
element array, which you can create by adding []
to the element name. This same technique can be used on SELECT
s and other elements, since it signals to the server that an array has been submitted, as opposed to value known by a single key.
<html>
<head>
<style type="text/css">
div img {
cursor: pointer;
border: 1px solid #f00;
}
</style>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.js"></script>
<script>
function setFormImage(id) {
if (id != '' && !document.getElementById('input_'+id)) {
var img = document.createElement('input');
img.type = 'text';
img.id = 'input_'+id;
img.name = 'images[]';
img.value = id;
document.imageSubmit.appendChild(img);
}
}
$(document).ready(function(){
$('#jqueryimages img').click(function(){
setFormImage(this.id);
});
});
</script>
</head>
<body>
<pre><?php
if (count($_GET['images'])) {
print_r($_GET['images']);
}
?></pre>
<div style="float: left; width: 49%;">
<h1>Plain ol' HTML</h1>
1. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-1" onclick="setFormImage(this.id)"/>
<br/>
2. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-2" onclick="setFormImage(this.id)"/>
<br/>
3. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-3" onclick="setFormImage(this.id)"/>
<br/>
4. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-4" onclick="setFormImage(this.id)"/>
</div>
<div id="jqueryimages" style="float: left; width: 49%;">
<h1>jQuery</h1>
5. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-5"/>
<br/>
6. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-6"/>
<br/>
7. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-7"/>
<br/>
8. <img src="http://www.gravatar.com/avatar/e1122386990776c6c39a08e9f5fe5648?s=128&d=identicon&r=PG" id="img-8"/>
</div>
<h1>Form Submit</h1>
<form name="imageSubmit" method="get">
<input type="submit" value="View Selected"/>
</form>
</body>
</html>