Question

How do i encode all chars in a string.

Example :
A = %32 // Or something like that
B = %33

I want to do this without hardcoding every char. And i also want to be able to decode it again.
Is there a php function for this?

Thanks.

Answer 1

If you really want to do this, you could do it with preg_replace_callback quite easily:

echo preg_replace_callback('/./', function($char) {
    return '%' . ord($char[0]);
}, 'this is probably an unnecessary step');
// %116%104%105%115%32%105%115%32%112%114%111%98%97%98%108%121%32%97%110%32%117%110%110%101%99%101%115%115%97%114%121%32%115%116%101%112

You could reverse it with the inverse, using chr:

echo preg_replace_callback('/%[^%]*/', function($seq) {
    return chr(substr($seq[0], 1));
}, '%116%104%105%115');
// this

However, this is almost certainly unnecessary for whatever you’re doing…

See:

• chr
• ord
• preg_replace_callback