Extract array values by html array notation.

gistfile1.php

<?php

function getInputValueByName($name, $data) {
    if (strpos($name, '[]') !== false) {
        $name = str_replace('[]', '', $name);
    }
    $parts = explode('[', $name);
    $value = $data;
    foreach ($parts as $part) {
        $part = rtrim($part, ']');
        if (isset($value[$part])) {
            $value = $value[$part];
        } else {
            return null;
        }
    } 
    return $value;
}

$array = array('foo' => 'bar',
               'baz' => array(1, 2, 3, 'foobar' => 'hello world'));
        
print '<pre>';

var_dump(getInputValueByName('foo', $array));
var_dump(getInputValueByName('bar', $array));
var_dump(getInputValueByName('bar[]', $array));
var_dump(getInputValueByName('bar[0]', $array));
var_dump(getInputValueByName('bar[foobar]', $array));
var_dump(getInputValueByName('baz', $array));
var_dump(getInputValueByName('baz[]', $array));
var_dump(getInputValueByName('baz[0]', $array));
var_dump(getInputValueByName('baz[foobar]', $array));