<?php
$string = 'A/B/PA ID U/PA ID U/C/D';
// get only first value starting with PA:
echo preg_match('~PA[^/]+~', $string, $match) ? $match[0] : '';
echo "\n---\n";
// get all values strings with PA:
var_export(preg_match_all('~PA[^/]+~', $string, $matches) ? $matches[0] : []);
echo "\n---\n";
// get all delimited values:
var_export(explode('/', $string));
PA ID U
---
array (
0 => 'PA ID U',
1 => 'PA ID U',
)
---
array (
0 => 'A',
1 => 'B',
2 => 'PA ID U',
3 => 'PA ID U',
4 => 'C',
5 => 'D',
)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PA ID U
---
array (
0 => 'PA ID U',
1 => 'PA ID U',
)
---
array (
0 => 'A',
1 => 'B',
2 => 'PA ID U',
3 => 'PA ID U',
4 => 'C',
5 => 'D',
)