Rewrite the function to convert PHP two-dimensional/three-dimensional array to string_PHP tutorial

//Convert all values ​​in the multi-dimensional array into strings————》Supports up to three-dimensional arrays
function implodex( $glue, $array, $separator='' ) {
if ( ! is_array( $array ) ) return $array;
$string = array();

$count = 0;
foreach ( $array as $key => $val ) {
if ( is_array( $val ) )
$val = implode( $glue, $val );

if($count == 0){
$string[] = "{$val}";
}else{
$string[] = "{$glue}{$val}";
}
}

if(empty( $separator))$separator = $glue;

return implode( $separator, $string );
}