Write the first PHP extension, implementing the number of computed arrays

Requirements: Write the first PHP extension, which contains a function called Maxwelldu, Maxwelldu can calculate the length of the array (same as Count)

Requirements: Learn about C + + programming, familiar with PHP programming

System: CentOS6.5

Environment: LNMP (yum mode installation)

Stepping out the first step to start writing PHP extension, will use a tool, and this tool in the PHP source, so we download a PHP source code, http://php.net/downloads.php

CD ~mkdir softwarecd softwarewget http://cn2.php.net/distributions/php-5.6.11.tar.gztar zxvf PHP-5.6.11.TAR.GZCD Php-5.6.11/ext

#创建扩展项目, after the creation is completed, there will be one more SayHello folder in the Ext directory, which is our extension project.

./ext_skel--EXTNAME=MAXWELLDUCD Maxwellduvim CONFIG.M4

#打开允许, remove php_arg_enable before the line of DNL and [--enable-maxwelldu] this line before the DNL

Php_arg_enable (Maxwelldu, whether to ENABLE Maxwelldu support,dnl Do sure that the comment is aligned:[  --enable-max Welldu           Enable Maxwelldu support])

#文件末尾添加

Vim php_maxwelldu.hphp_function (MAXWELLDU);

#在文件末尾添加

Vim maxwelldu.c ' php_function (maxwelldu) {        zval *arr;               Declare a variable to accept the array parameter        HashTable *arr_hash;    Declares a hashtable variable        int array_count;        Declares an array-length variable        if (Zend_parse_parameters (Zend_num_args () tsrmls_cc, "a", &arr) ==failure) {//determines the accepted array is > no is an array , and put the value in Arr                return;        }        Arr_hash = z_arrval_p (arr); Convert the array to hashtable        Array_count = zend_hash_num_elements (Arr_hash);//Get a total of how many elements Zend by the function provided by Return_long        ( Array_count); Returns the number of elements} ' ' #然后修改zend_function_entry maxwelldu_functions[] = {The contents are "Const Zend_function_entry maxwelldu_ Functions[] = {        Php_fe (maxwelldu,null)        {null,null,null}}; "

#打包

#注意PHP的安装方式不同php-config may not be the same directory

Phpize./configure--with-php-c/bin/php-configmakemake Testmake Install

#这个时候会自动将扩展放到对应的扩展目录

#修改php的配置文件, like adding mysql,memcache and other extensions as usual

#重启apache或者php-FPM

Extension=maxwelldu.soservice httpd restartservice php-fpm Restart

#查看已经安装的扩展

Php-m

#在phpinfo里面可以查看到maxwelldu

#然后就可以在PHP脚本里面使用了

!--? Php$arr = [1, 2, 3, 4, 5];echo maxwelldu ($arr) = = Count ($arr), php_eol;//Print out 1 to indicate the number of arrays returned by the function and the coun of the system The T function returns the same value as  
 Reference address: 
 
 http://blog.csdn.net/heiyeshuwu/article/details/3453854 
 
/http www.360doc.com/content/13/1226/17/14452132_340319333.shtml 
 
 Http://www.nowamagic.net/librarys/veda/detail /1467 
 
 http://blog.csdn.net/super_ufo/article/details/3863731 
 
 http://www.phppan.com/2010/02/                                                php-source-12-return_value/
 
 http://www.ccvita.com/496.html 
 
 
 
 The above describes the writing of the first PHP extension, the implementation of the number of arrays, including aspects of the content, I hope to be interested in PHP tutorial friends helpful. 
 
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