Category Archives: Code

CSS3: Rounded Table Corners (No images)

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You cannot give a whole table (<table>) rounded corners using CSS, browsers will ignore it, you must round the corners of the cells (<td>) inside.

The following uses CSS2 selectors (:first-child etc) and CSS3′s corner-rounding border-radius to selectively round the outer corners of the cells in the corners.
This will work for any size table.

table.rounded-corners tr:first-child td:first-child {
	border-top-left-radius: 5px;
}
table.rounded-corners tr:first-child td:last-child {
	border-top-right-radius: 5px;
}
table.rounded-corners tr:last-child td:first-child {
	border-bottom-left-radius: 5px;
}
table.rounded-corners tr:last-child td:last-child {
	border-bottom-right-radius: 5px;
}

PHP Bug: json_encode() misleading warning on object with private properties

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I have found a peculiar issue with PHP’s json_encode() function.

If you have an instance object with private properties and use json_encode() it will give you a very misleading warning.

class ExampleObject {
    private $privateProperty;
    ...
}
$obj = new ExampleObject();
json_encode($obj);

results in

Warning: json_encode() … recursion detected …

There are two workarounds in the comments for the function at php.net but this is simply a PHP bug as far as I am concerned.

BBC Homepage Beta Using jQuery

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The BBC Beta Homepage is using jQuery, but unfortunately it’s ugly.

I should qualify that – I think it’s a good move to make the homepage more personalisable, but does it have to look so Web2.0?
Big text was a fad a year ago, but it’s too informal for an internationally recognised and respected news source, and it makes it look so childish – I dread to think what the new CBBC sites would look like!

I realise this is only a beta, and may well change considerably, but without a bit of a shrink I won’t be likely to use it as a homepage tab.

JS: Clear Default Value onFocus

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Simply add the following to the the onFocus attribute of any HTML form input tag.
[code lang="JavaScript"]if (this.value == this.defaultValue) this.value = '';[/code]
this.defaultValue is automatically given the value in the HTML.

Append to Body onLoad

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I looked for a long time how I could add JavaScript functions to an HTML document’s onLoad attribute.

Eventually I found this, something so obvious that I had considered trying it but foolishly didn’t try.

[code lang="JavaScript"]
var oldLoad = window.onload;
window.onload = function() {
oldLoad();
function2();
}
[/code]

jsReq

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I wanted to tell the user that they need JavaScript, but obviously only if they don’t already have it enabled.
The following is a very crude script which uses the very fact that JS is available to hide the requirement notice…

HTML:
[code lang="html"]

Warning!
You need to have javascript enabled to use this page.

[/code]

JS:
[code lang="JavaScript"]
function removeElementById(eleId) {
eleId = document.getElementById(eleId);
if (eleId.parentNode && eleId.parentNode.removeChild) {
eleId.parentNode.removeChild(eleId);
}
}
removeElementById("jsRequiredDiv");
[/code]