how to replace var {$key} in array php key => aulue

Question

I needed an assistant

about replace for simple variables:

$html = '<{$headtype} class="{$class}">{$text}</{$headtype}>';
$array['headtype']  = 'h1';
$array['class']     = 'classname';
$array['text']      = 'the title'; 
// result
<h1 class="classname">the title</h1>

Knowing that the array is variable in keys and values

Answer 1

You can set the array key and old key to unset like that, $arr[$newkey] = $arr[$oldkey]; unset($arr[$oldkey]); More information you can check below article. change the key of an array element

Answer 2

Just iterate through the array and use str_replace() to replace the strings:

foreach ($array as $key => $value) {
    $html = str_replace('{$'.$key.'}', $value, $html);
} 

Demo: https://3v4l.org/PceWI

Answer 3

$array['headtype']  = 'h1';
$array['class']     = 'classname';
$array['text']      = 'the title'; 
extract($array)
$html = '<{$headtype} class="{$class}">{$text}</{$headtype}>';

is what you want if i get the question right. please comment below and i will update my answer as you want.