PHP-функция: base64_encodeСписок php-функций

javascript:

function base64_encode( data ) {
	// Encodes data with MIME base64
	// 
	// +   original by: Tyler Akins (http://rumkin.com)
	// +   improved by: Bayron Guevara

	var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	var o1, o2, o3, h1, h2, h3, h4, bits, i=0, enc='';

	do { // pack three octets into four hexets
		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;

		// use hexets to index into b64, and append result to encoded string
		enc += b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
	} while (i < data.length);

	switch( data.length % 3 ){
		case 1:
			enc = enc.slice(0, -2) + '==';
		break;
		case 2:
			enc = enc.slice(0, -1) + '=';
		break;
	}

	return enc;
}

//Примеры:

alert ( base64_encode('Kevin van Zonneveld') );