The `Str::before` implementation:Found it! **Line 216** has the bug:

[alexstandiford]

The Str::before implementation:Found it! Line 216 has the bug:

public static function before($subject, $before = ' '): string
{
 return substr($subject, 0, strpos($subject, $before) - strlen($subject));
}

The Bug

The formula is wrong: strpos($subject, $before) - strlen($subject)

When you call Str::before('wpl::public/assets/icon.svg', '::'):

• $subject = 'wpl::public/assets/icon.svg'
• $before = '::'
• strpos($subject, $before) = 3 (position of ::)
• strlen($subject) = 28
• Result: substr($subject, 0, 3 - 28) = substr($subject, 0, -25)

This returns the string from position 0, going backwards 25 characters from the end, which would be 'wpl:' (including the first colon).

The Fix

Should be:

return substr($subject, 0, strpos($subject, $before));

The length parameter should just be the position of $before, not position - strlen($subject).Bug identified in mu-plugins/vendor/phpnomad/utils/lib/Helpers/Str.php:216

The Str::before() method is using incorrect math. It should return everything before the delimiter, but instead it's doing strpos($subject, $before) - strlen($subject) which creates a negative offset and returns incorrect results.