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How to use C language to write extensions in php

青灯夜游
Release: 2023-04-05 18:06:01
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本篇文章给大家带来的内容是介绍如何使用C语言给PHP写扩展,,有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。

1、在php源码路径的ext文件夹下,新建一个extend_test.def文件,编辑文件内容为:

string my_test_function(string str,int n)
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2、在当前目录执行

./ext_skel --extname=extend_test --proto=extend_test.def
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其中,extname是扩展的名,proto是刚创建的文件,也可以用全路径

3、在当前目录下会生成extend_test文件夹,编辑extend_test文件夹下的config.m4

去掉一下三行的dnl的注释

PHP_ARG_ENABLE(extend_test, whether to enable extend_test support,
Make sure that the comment is aligned:
[  --enable-extend_test           Enable extend_test support])
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4、编辑extend_test文件夹下的extend_test.c文件

找到以下方法并修改

PHP_FUNCTION(my_test_function)
{
    char *str = NULL;
    int argc = ZEND_NUM_ARGS();
    size_t str_len;
    zend_long n;
    char *result;
    char *ptr;
    zend_long result_length;
    if (zend_parse_parameters(argc TSRMLS_CC, "sl", &str, &str_len, &n) == FAILURE)
        return;
    result_length = str_len * n;
    result = (char *) emalloc(result_length + 1);
    ptr = result;
    while (n--) {
        memcpy(ptr, str, str_len);
        ptr += str_len;
    }
    *ptr = '\0'; 
    RETURN_STRINGL(result, result_length);
}
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5、生成扩展:

在extend_test文件夹下,运行/home/php/bin/phpize(实际为phpize所在路径)

然后运行./configure --with-php-config=/home/php/bin/php-config(实际为php-config所在路径)

6、编译安装

make             
make install
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7、执行完后会显示扩展安装到了哪个路径下

然后修改php.ini增加扩展信息

extension=extend_test.so
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8、测试扩展是否可用

新建test.php文件并将内容编辑为

<?php
echo my_test_function(&#39;a&#39;,5);
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保存后用php运行,显示出aaaaa表示扩展成功安装

相关视频教程推荐:《PHP教程

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