PHP - Multidimensional array to CSV

Question

I currently have coded a way to turn a multidimensional array to comma separated values (I\'m using pipes instead of commas for ease of debugging). The problem is, I know th

Answer 1

This is some pseudocode, but it is a start:

$strings = [];
$flattenArray = function($arr, $level) use (&$strings, &$flattenArray) {

    foreach($arr as $key=>$value){
        $s = &$strings[$level];
        if(!isset($s)) { $s = array(); }
        $s[] = $key;
        if(is_array($value)) {
           $flattenArray($value, $level);
        }
        else {
           $s[] = $value;
        }
        $level ++;
    }
};
$flattenArray($myArray, 0);
foreach($strings as &$arr) {
     $arr = implode("||", $arr);
}

Small demo with your array: http://codepad.viper-7.com/CR2SPY <-- It does not work fully, but it is a start

---

Update:

Here is a demo that I think works the way you want: http://codepad.viper-7.com/shN4pH

Code:

$strings = [];
$flattenArray = function($arr, $level, $k = null) use (&$strings, &$flattenArray) {

    foreach($arr as $key=>$value){
        if($k === null) {
            $s = &$strings[$key];
        }
        else {
            $s = &$strings[$k];
        }
        if(!isset($s)) { 
            $s = array();  
        }
        $str = &$s[$level];
        if(!isset($str)) { 
            $str = array(); 
            
            if($k !== null) { $str[] = $k; }
        }
        $str[] = $key;
        if(is_array($value)) {
           $flattenArray($value, $level, ($k === null) ? $key : $k);
        }
        else {
            $str[] = is_null($value) ? "null" : $value;
        }
        $level ++;
    }
};
$flattenArray($myArray, 0);
$all = [];
foreach($strings as $k => $arr){
    $new = array();
    foreach($arr as $ky => $ar) {
        $all[] = implode("||", $ar);
    }
}

print_r($all);