Associates integer-indexed arrays

to_assoc.php

<?php
/*
    Replace array indices with associative keys
    Copyright (C) 2015 Christoph "criztovyl" Schulz

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * Converts an array to an associative array
 */
function to_assoc($array, $key, $deep = false){

    if( gettype ( $array ) != "array" ) return $array;

    //The new array
    $new = array();

    //Iterate
    foreach ( $array as $element ) {

        //Check if associative key is set in element
        if( isset ( $element[$key] ) ) {

            // Retrieve the associative key
            $key_ = $element[$key];

            // Associate
            $new[$key_] = $element;

            // Remove associative key from element
            unset($new[$key_][$key]);

            // Go deeper?
            if ( $deep )
               //Itearate
                foreach ( $new[$key_] as $subkey => $value )
                    //Got deeper
                    $new[$key_][$subkey] = to_assoc($value, $key, $deep);

        }
        else array_push($new, $element);
        
    }
    
    return $new; 
}