[3.x][PHP8.5] Passing a string which is not a single byte to ord() is deprecated

[heelc29]

Summary of Changes

The ord() function accepts the empty string (in which case it uses the null byte that terminates the C string and returns 0) and strings longer than one byte (in which case it returns the value of the first byte).
Both of these cases indicate some sort of programming bug, as such we propose deprecating this behaviour.

Deprecated: Providing a string which is not one byte long is deprecated, use $str[0] instead

https://wiki.php.net/rfc/deprecations_php_8_5#deprecate_passing_string_which_are_not_one_byte_long_to_ord

Testing Instructions

Run unit tests ./vendor/bin/phpunit

• enable max error reporting
• use php 8.5 (latest pre-version 8.5.0rc1)

Documentation Changes Required

no