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function ini_set (varname, newvalue) {
    // Set a configuration option, returns false on error and the old value of the configuration option on success  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/ini_set    // +   original by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: This will not set a global_value or access level for the ini item
    // *     example 1: ini_set('date.timezone', 'America/Chicago');
    // *     returns 1: 'Asia/Hong_Kong'
    var oldval = '',        that = this;
    this.php_js = this.php_js || {};
    this.php_js.ini = this.php_js.ini || {};
    this.php_js.ini[varname] = this.php_js.ini[varname] || {};
    oldval = this.php_js.ini[varname].local_value; 
    var _setArr = function (oldval) { // Although these are set individually, they are all accumulated
        if (typeof oldval === 'undefined') {
            that.php_js.ini[varname].local_value = [];
        }        that.php_js.ini[varname].local_value.push(newvalue);
    };
 
    switch (varname) {
    case 'extension':        if (typeof this.dl === 'function') {
            this.dl(newvalue); // This function is only experimental in php.js
        }
        _setArr(oldval, newvalue);
        break;    default:
        this.php_js.ini[varname].local_value = newvalue;
        break;
    }
    return oldval;}

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ini_set('date.timezone', 'America/Chicago');

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'Asia/Hong_Kong'