PHPst - 1 year ago 121

PHP Question

What is the fastest or most convenient possible way to convert a multi-dimensional array to a single HTML-like array (the method that is used to set the

`name`

`$ar = [`

'x' => ['a' => 1, 'b' => 2, 'c' => 3],

'y' => ['yy' => ['yyy' => 3]],

'z' => 3333,

'm' => [1, 2],

];

should be converted to:

`$ar = [`

'x[a]' => 1,

'x[b]' => 2,

'x[c]' => 3,

'y[yy][yyy]' => 3,

'z' => 3333,

'm[0]' => 1,

'm[1]' => 2,

];

Here is my first try:

`$ar = [`

'x' => ['a' => 1, 'b' => 2, 'c' => 3],

'y' => ['yy' => ['yyy' => '3']],

'z' => 3333,

'm' => [1, 'x']

];

function convert($key, $value, &$new)

{

foreach ($value as $k => $v) {

if (is_array($v)) {

convert($key."[$k]", $v, $new);

}

else {

$new[$key."[$k]"] = $v;

}

}

}

$r = [];

convert(null, $ar, $r);

print_r($r);;

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Answer Source

I do not know about speed, but this is a convenient way to do the trick:

```
$ar = convert_array( $ar );
function convert_array( $a, $key = '' ) {
static $arr = array();
foreach( $a as $k => $v ) {
$key_name = $key == '' ? $k : $key . '[' . $k . ']';
if ( is_array( $v) ) {
convert_array( $v, $key_name );
} else {
$arr[$key_name] = $v;
}
}
return $arr;
}
```

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