The goal is to pass a specific array element through custom_format().
Example: If $hierarchy = '4:0:2', then $data[4][0][2] = custom_format($data[4][0][2]).
Does anyone know how to replicate the following code without relying on eval()?
Current code:
$hierarchy = '4:0:2';
$hierarchy = str_replace(':', '][', $hierarchy);
eval("\$data[$hierarchy] = custom_format(\$data[$hierarchy]);");
Thanks in advance.
An overly verbose yet elegant option is the following:
class MyArray implements ArrayAccess {
public function offsetExists($offset) {
if(!is_array($offset))
$offset = explode(':', $value);
$key = array_shift($offset);
if($key !== NULL) {
if($this->$key InstanceOf MyArray) {
return(isset($this->$key[$offset]));
}
}
}
public function offsetGet($offset) {
if(!is_array($offset))
$offset = explode(':', $value);
$key = array_shift($offset);
if($key !== NULL) {
if($this->$key InstanceOf MyArray) {
return($this->$key[$offset]);
}
}
}
public function offsetSet($offset, $value) {
if(!is_array($offset))
$offset = explode(':', $value);
$key = array_shift($offset);
if($key !== NULL) {
if(!($this->$key InstanceOf MyArray)) {
$this->$key = new MyArray;
}
$this->$key[$offset] = $value;
}
}
public function offsetUnset($offset) {
if(!is_array($offset))
$offset = explode(':', $value);
$key = array_shift($offset);
if($key !== NULL) {
if($this->$key InstanceOf MyArray) {
return(unset($this->$key[$offset]));
}
if(count($offset) == 0) {
return(unset($this->$key));
}
}
}
}
This does imply using MyArray everywhere you need this kind of array behaviour and perhaps creating a static method that recursively converts arrays and they array children into MyArray objects so that they will respond consistently to this behavior.
One concrete example is the need to change the offsetGet method, to check if $value is an array then to use the conversion function to convert it to a MyArray if you want to access its elements.
How about something like this:
<?php
$hierarchy = '4:0:2';
list($a,$b,$c) = explode(':',$hierarchy);
echo $data[$a][$b][$c];
?>
4.0.2), but you can easily change it to:.