mysqlstr

Introduction

a php extension provide string processing of mysql

(strtolower && strtoupper base utf8)

把mysql里的字符串處理函數封裝成php擴展，供php使用

目前只提供了utf8下的大寫轉小寫以及小寫轉大寫這兩個功能

Why need this php ext

the result of strtolower(strtoupper) is different between php and mysql

efficiency

寫這個擴展的目的有兩個，一個是php的大小寫轉換函數和mysql的有一些區別，另外一個是性能問題

##Installation

$ /path/to/phpize

$ ./configure --with-php-config=/path/to/php-config

$ make

$ make install

add extension=mysqlstr.so in php.ini

Interface

strtoupper_utf8_ext

strtoupper_utf8_ext - make a utf8 string uppercase

Description

string strtoupper_utf8_ext(string str)

strtolower_utf8_ext

strtolower_utf8_ext - make a utf8 string lowercase

Description

string strtolower_utf8_ext(string str)

Example

case

$str = "High School D×DⅡ ";

$timeMB = microtime(true);

$resMb = mb_strtolower( $str, "UTF-8");

$timeMB = microtime(true) - $timeMB;

$timeSQL = microtime(true);

$resSQL = strtolower_utf8_ext($str);

$timeSQL = microtime(true) - $timeSQL;

echo "mbTime:" . sprintf("%.5f",$timeMB)." \n";

echo "sqlTime:" . sprintf("%.5f",$timeSQL)."\n";

echo "mbRes:" . $resMb . "\n";

echo "sqlRes:" . $resSQL . "\n";

result

mbTime:0.00004

sqlTime:0.00001

mbRes:high school d×dⅡ

sqlRes:high school d×dⅱ

efficiency case

$str = "High School D×DⅡ ";

$timeMB = microtime(true);

for($i=0;$i<30000;$i++)

$resMb = mb_strtolower( $str, "UTF-8");

$timeMB = microtime(true) - $timeMB;

$timeSQL = microtime(true);

for($i=0;$i<30000;$i++)

$resSQL = strtolower_utf8_ext($str);

$timeSQL = microtime(true) - $timeSQL;

echo "mbTime: " . sprintf("%.5f",$timeMB)." \n";

echo "sqlTime: " . sprintf("%.5f",$timeSQL)."\n";

result:

mbTime: 0.18481

sqlTime: 0.01055

More

String processing of mysql base mysql-5.1.74

More related analysis base Chinese is here

總結

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