convert string to array

function special_explode($string) {
 $keyval = explode('=', $string);
 $keys = explode('__', $keyval[0]);
 $result = array();
 //$last is a reference to the latest inserted element 
 $last =& $result;
 foreach($keys as $k) {
 $last[$k] = array();
 //Move $last 
 $last =& $last[$k];
 }
 //Set value 
 $last = $keyval[1];
 return $result;
}
//Test code:
$string = 'test1__test2__test3__test4__test5__test6=value';
print_r(special_explode($string));

Yes it is possible:

list($keys, $value) = explode('=', $str);
$keys = explode('__', $keys);
$t = &$data;
$last = array_pop($keys);
foreach($keys as $key) {
 if(!isset($t[$key]) || !is_array($t[$key])) {
 // will override non array values if present
 $t[$key] = array();
 }
 $t = &$t[$key];
}
$t[$last] = $value;

DEMO

Reference: list, explode, =&, is_array, array_pop

$data = array();
// Supposing you have multiple strings to analyse...
foreach ($strings as $string) {
 // Split at '=' to separate key and value parts.
 list($key, $value) = explode("=", $string);
 // Current storage destination is the root data array.
 $current =& $data;
 // Split by '__' and remove the last part
 $parts = explode("__", $key);
 $last_part = array_pop($parts);
 // Create nested arrays for each remaining part.
 foreach ($parts as $part)
 {
 if (!array_key_exists($part, $current) || !is_array($current[$part])) {
 $current[$part] = array();
 }
 $current =& $current[$part];
 }
 // $current is now the deepest array ($data['test1']['test2'][...]['test5']).
 // Assign the value to his array, using the last part ('test6') as key.
 $current[$last_part] = $value;
}

$str = ...;
eval( str_replace('__', '][', 
preg_replace('/^(.*)=(.*)$/', '\$data[1ドル]=\'2ドル\';', $str)) );

easier way, assuming the $str is trustable data

I suppose it is...

$string = "test1__test2__test3__test4__test5__test6=value";
$values = explode('=',$string);
$indexes = explode('__',$values[0]);
$data[$indexes[0]][$indexes[1]][$indexes[2]][$indexes[3]][$indexes[4]][$indexes[5]] = $values[1];

• php
• multidimensional-array