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run code in 300+ PHP versions simultaneously

@ 2015-11-01T01:03:36Z

<?php
class ObjContainer { }
class Array2Obj {
    public function isArrayAssociative(array $array) {
        return (bool) count(array_filter(array_keys($array), 'is_string'));
    }
    public function __CONSTRUCT(array $array) {
        if(isArrayAssociative($array)) {
            $obj = new ObjContainer;
            foreach($array as $key => $val) {
                if(is_array($val)) {
                    $obj->{$key} = new Array2Obj($val);
                }
                else {
                    $obj->{$key} = $val;
                }
            }
            return $obj;
        }
        else {
            $array = array();
            foreach($array as $val) {
                if(is_array($val)) {
                    $array[] = new Array2Obj($val);
                }
                else {
                    $array[] = $val;
                }
            }
            return $array;
        }
    }
}
$array = ["database"=>["host"=>"localhost","dbname"=>"mydb","user"=>"root","password"=>""]];
$xml = new Array2Obj($array);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Error: Call to undefined function isArrayAssociative() in /in/FPHKM:8 Stack trace: #0 /in/FPHKM(35): Array2Obj->__CONSTRUCT(Array) #1 {main} thrown in /in/FPHKM on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21: Fatal error: Call to undefined function isArrayAssociative() in /in/FPHKM on line 8
Process exited with code 255.

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