axing's blog » PHP

PHP.JS – Use PHP functions in JavaScript

axing — Tue, 03 Feb 2009 06:31:54 +0000

PHP.JS is an open source project in which to port PHP functions to JavaScript. The library is developed by Kevin van Zonneveld and his contributors, and they have been working hard in adding more functions into it. By including this library into your own web projects, you can use those higher-level PHP functions such as file_get_contents(), mktime(), serialize(), etc which JavaScript doesn't support them natively.

Here is a piece of sample code of PHP's encryption function: base64_encode():

function base64_encode( data ) {

    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

    var o1, o2, o3, h1, h2, h3, h4, bits, i = ac = 0, enc="", tmp_arr = [];

    data = utf8_encode(data);

    do {

        o1 = data.charCodeAt(i++);

        o2 = data.charCodeAt(i++);

        o3 = data.charCodeAt(i++);

        bits = o1<<16 | o2<<8 | o3;

        h1 = bits>>18 & 0x3f;

        h2 = bits>>12 & 0x3f;

        h3 = bits>>6 & 0x3f;

        h4 = bits & 0x3f;

        tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);

    } while (i < data.length);

    enc = tmp_arr.join('');

    switch( data.length % 3 ){

    case 1:

        enc = enc.slice(0, -2) + '==';

    break;

    case 2:

        enc = enc.slice(0, -1) + '=';

    break;

    return enc;

The library is available in 2 different packages:

Namespaced (min/packed)- all functions are contained in one object; and
Normal (min/packed)- just a collection of standalone functions.

Gregorian to Lunar Calendar Converter

axing — Thu, 25 Dec 2008 06:24:30 +0000

Sometimes I just have the urge to know what the Lunar date of someone's birthday or a Chinese festival when no Chinese calendar is around. And, I am just getting annoyed when my friends keep asking me to help them find an online date converter. So I made it myself and I put it on my website.

This converter helps you to convert a valid Gregorian (Western) date into Lunar (Chinese) date.

Today is Christmas Day, and this small Christmas gift I made just for you.

Hohoho! Merry Christmas!

PHP: Convert If to Switch

axing — Tue, 23 Dec 2008 14:37:52 +0000

I have been being asked by some friends of mine, that is in PHP language how to convert If statement into Switch statement (in some cases, using Switch is for shortening code).

At first, I thought that Switch was just only for 'equal' comparison. But actually it is more than just equal. So I did a search, and I found there is a way that can code Switch just like If. Well, I'm lazy to explain, so let's see the following sample codes of getting Grade from Score:

If statement:

$score=78;

if ($score>=85): echo "Grade A";

elseif ($score>=70): echo "Grade B";

elseif ($score>=55): echo "Grade C";

elseif ($score>=40): echo "Grade D";

else: echo "Grade E";

endif;

Switch statement:

$score=78;

switch(true) {

  case $score>=85: echo "Grade A"; break;

  case $score>=70: echo "Grade B"; break;

  case $score>=55: echo "Grade C"; break;

  case $score>=40: echo "Grade D"; break;

  default: echo "Grade E";

Both code produces same result, that is "Grade B".