3v4l.org

run code in 300+ PHP versions simultaneously

@ 2017-12-14T07:12:50Z

<?php
$testArray= array(
    'test1' => 'SingleValue1',
    'test2' => 'SingleValue2',
    'test3' => array(0,1,2),
    'test4' => array(array(3,4,array(5,6,7)), array(8,9,array(10,11,12)),13,14),
    'test5' => array(15,16,17, array(18,19,20))
);

function deepestArrays($array,$level=0,&$lowest=[]){
    if(sizeof($subarrays=array_filter($array,function($v){return is_array($v);}))){  // isolate subarrays, iterate if any
        foreach($subarrays as $subs){
            deepestArrays($subs,$level+1,$lowest);  // recurse each subarray
        }
    }else{
       if(!sizeof($lowest) || ($lowest_level=key($lowest))==$level){  // if $levels is empty or current $level equals $lowest_level
            $lowest[$level][]=$array;  // append the array to the results
        }elseif($lowest_level<$level){
            $lowest=[$level=>[$array]]; // clear previous storage, store new lowest array
        }
    }
    return current($lowest);  // use current() to strip the temporary level identifying key
}

var_export(deepestArrays($testArray));

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: array ( 0 => array ( 0 => 5, 1 => 6, 2 => 7, ), 1 => array ( 0 => 10, 1 => 11, 2 => 12, ), )
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/unVR5 on line 10
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/unVR5 on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected '=', expecting ')' in /in/unVR5 on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected '=', expecting ')' in /in/unVR5 on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `')'' in /in/unVR5 on line 10
Process exited with code 255.

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