jfcherng/php-mb-string

An implementation targeting high performance for frequently reading/writing operations.

php-mb-string

, _(*1)

A high performance multibyte sting implementation for frequently reading/writing operations., _(*2)

Why I Write This Package?

Consider that you have a LONG multibyte string and you want to do lots of following operations on it., _(*3)

• Random reading/writing such as $char = $str[5]; or $str[5] = '許';.
• Replacement such as str_replace($search, $replace, $str);.
• Insertion such as substr_replace($insert, $str, $position, 0);.
• Get substring such as substr($str, $start, $length);.

Because strings in PHP are not UTF-8, to do operations above safely, you have to either use mb_*() functions or calculate the index by yourself. Using mb_*() functions frequently can be a performance loss because it has to re-decode the source string basing on the given encoding every time when you call it. The longer the string is, the severer the problem becomes., _(*4)

Instead, this class internally stores the string in its UTF-32 form, which is fixed-width (1 char always occupies 4 bytes) so we are able to perform speedy random accesses. With the power of random access, we could use str_*() functions to do the job internally., _(*5)

Installation

composer require jfcherng/php-mb-string

Example

See tests/MbStringTest.php., _(*6)

Benchmark

See benchmark/_results.txt., _(*7)

What Are You Doing With This Package?

I develop this for a PHP diff package, jfcherng/php-diff., _(*8)