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run code in 300+ PHP versions simultaneously

@ 2017-10-10T06:07:17Z

<?php

    $arr =Array(
        0 => Array
            (
                0 => "string",
                1 => 1,
                "return" => true
            ),
    
        "two" => Array
            (
                0 => "2017-10-09",
                1 => 248.38,
                "return" => false
            ),
        3 => -123.4,
        4 => array(
                0 => array(
                    0 => "foo",
                    1 => array(
                        0 => "bar"
                        )
                    )
            )
    );

    
    printArray($arr        // Input array for output
               , "array("  // type of output "array()" or "[]"
               , 1         // start padding multiplied with 4. 1 = 4 spaces indenting at start.
               , false     // is input a subarray. Always false when you call the function. Only function itself should change this
               );
    
    function printArray($arr, $output, $pad, $subarray){
        // If it's a subarray don't indent "array" text
        if($subarray){
            echo str_pad("", 0, " ") . $output ."\n";
        }else{
            echo str_pad("", $pad*4, " ") . $output ."\n";
        }
        
        $i=1;
        foreach($arr as $key => $item){
            if(is_array($item)){
                echo str_pad("", ($pad+1)*4, " ");
                // add "" to key if it's associative
                if(is_string($key)){
                    echo "\"" . $key. "\" => ";
                }else{
                    echo $key . " => ";
                }
                // recrusive run printArray with padding +1 (more indenting)
                printArray($item, $output, $pad+1, true);
            }else{
                echo str_pad("", ($pad+1)*4, " ");
                
                // add "" to key if it's associative
                if(is_string($key)){
                    echo "\"" . $key. "\"";
                }else{
                    echo $key;
                }
                
                // echo item with "" if it's string, or as bool or else as numeric (float/int)
                if(is_string($item)){
                    echo " => \"". $item ."\"";
                }else if(is_bool($item)){
                    $bool = var_export($item,true);
                    echo " => ". $bool;
                }else{
                    echo " => ". $item;
                }
                
                // if it's the last item, don't add comma to end of array
                if($i == count($arr)){
                    echo "\n";
                }else{
                    echo ",\n";
                }
                $i++;
            }
        }
        
        // add correct closing bracket
        if($output == "["){
            echo str_pad("", $pad*4, " ") . "]";
        }else{
            echo str_pad("", $pad*4, " ") . ")";
        }
        
        // if it's the very last item add a ; instead of ,
        if($pad == 1){
            echo ";\n";
        }else{
            if($i == count($arr)){
                    echo "\n";
                }else{
                    echo ",\n";
                }
        }
    }

Output for 7.0.0 - 7.0.24, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: array( 0 => array( 0 => "string", 1 => 1, "return" => true ), "two" => array( 0 => "2017-10-09", 1 => 248.38, "return" => false ), 3 => -123.4, 4 => array( 0 => array( 0 => "foo", 1 => array( 0 => "bar" ), ) ) );
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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