// http://kevin.vanzonneveld.net

function array_key_exists ( key, search ) {
    if( !search || (search.constructor !== Array && search.constructor !== Object) ){
        return false;
    }

    return key in search;
}

function explode( delimiter, string, limit ) {

    var emptyArray = { 0: '' };

    // third argument is not required
    if ( arguments.length < 2
        || typeof arguments[0] == 'undefined'
        || typeof arguments[1] == 'undefined' )
    {
        return null;
    }

    if ( delimiter === ''
        || delimiter === false
        || delimiter === null )
    {
        return false;
    }

    if ( typeof delimiter == 'function'
        || typeof delimiter == 'object'
        || typeof string == 'function'
        || typeof string == 'object' )
    {
        return emptyArray;
    }

    if ( delimiter === true ) {
        delimiter = '1';
    }

    if (!limit) {
        return string.toString().split(delimiter.toString());
    } else {
        // support for limit argument
        var splitted = string.toString().split(delimiter.toString());
        var partA = splitted.splice(0, limit - 1);
        var partB = splitted.join(delimiter.toString());
        partA.push(partB);
        return partA;
    }
}

function in_array ( pArray, pValue ) {
	for(var i = 0, l = pArray.length; i < l; i++) {
		if(pArray[i] == pValue) {
			return true;
		}
	}
	return false;
}

function print_r( array, return_val ) {

    var output = "", pad_char = " ", pad_val = 4;

    var formatArray = function (obj, cur_depth, pad_val, pad_char) {
        if (cur_depth > 0) {
            cur_depth++;
        }

        var base_pad = repeat_char(pad_val*cur_depth, pad_char);
        var thick_pad = repeat_char(pad_val*(cur_depth+1), pad_char);
        var str = "";

        if (obj instanceof Array || obj instanceof Object) {
            str += "Array\n" + base_pad + "(\n";
            for (var key in obj) {
                if (obj[key] instanceof Array) {
                    str += thick_pad + "["+key+"] => "+formatArray(obj[key], cur_depth+1, pad_val, pad_char);
                } else {
                    str += thick_pad + "["+key+"] => " + obj[key] + "\n";
                }
            }
            str += base_pad + ")\n";
        } else if(obj == null || obj == undefined) {
            str = '';
        } else {
            str = obj.toString();
        }

        return str;
    };

    var repeat_char = function (len, pad_char) {
        var str = "";
        for(var i=0; i < len; i++) {
            str += pad_char;
        };
        return str;
    };
    output = formatArray(array, 0, pad_val, pad_char);

    if (return_val !== true) {
        document.write("<pre>" + output + "</pre>");
        return true;
    } else {
        return output;
    }
}

function implode( glue, pieces ) {
    return ( ( pieces instanceof Array ) ? pieces.join( glue ) : pieces );
}

function array_merge () {
    // Merges elements from passed arrays into one array  
    // 
    // version: 1009.2513
    // discuss at: http://phpjs.org/functions/array_merge    // +   original by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Nate
    // +   input by: josh
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: arr1 = {"color": "red", 0: 2, 1: 4}    // *     example 1: arr2 = {0: "a", 1: "b", "color": "green", "shape": "trapezoid", 2: 4}
    // *     example 1: array_merge(arr1, arr2)
    // *     returns 1: {"color": "green", 0: 2, 1: 4, 2: "a", 3: "b", "shape": "trapezoid", 4: 4}
    // *     example 2: arr1 = []
    // *     example 2: arr2 = {1: "data"}    // *     example 2: array_merge(arr1, arr2)
    // *     returns 2: {0: "data"}
    
    var args = Array.prototype.slice.call(arguments),
                            retObj = {}, k, j = 0, i = 0, retArr = true;    
    for (i=0; i < args.length; i++) {
        if (!(args[i] instanceof Array)) {
            retArr=false;
            break;        }
    }
    
    if (retArr) {
        retArr = [];        for (i=0; i < args.length; i++) {
            retArr = retArr.concat(args[i]);
        }
        return retArr;
    }    var ct = 0;
    
    for (i=0, ct=0; i < args.length; i++) {
        if (args[i] instanceof Array) {
            for (j=0; j < args[i].length; j++) {                retObj[ct++] = args[i][j];
            }
        } else {
            for (k in args[i]) {
                if (args[i].hasOwnProperty(k)) {                    if (parseInt(k, 10)+'' === k) {
                        retObj[ct++] = args[i][k];
                    } else {
                        retObj[k] = args[i][k];
                    }                }
            }
        }
    }
    return retObj;}