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使用日志记录功能查看PHP扩展的执行过程
了解过PHP内核的同学都知道,PHP的一次请求的生命周期
1.启动Apache后,PHP解释程序也随之启动。PHP调用各个扩展的MINIT方法,从而使这些扩展切换到可用状态
2.当一个页面请求发生时,SAPI层将控制权交给PHP层。于是PHP设置了用于回复本次请求所需的环境变量。同时,它还建立一个变量表,用来存放执行过程 中产生的变量名和值。PHP调用各个模块的RINIT方法,即“请求初始化”。RINIT方法可以看作是一个准备过程, 在程序执行之间就会自动启动
3.如同PHP启动一样,PHP的关闭也分两步。一旦页面执行完毕(无论是执行到了文件末尾还是用exit或die函数中止),PHP就会启动清理程序。它会按顺序调用各个模块的RSHUTDOWN方法。 RSHUTDOWN用以清除程序运行时产生的符号表,也就是对每个变量调用unset函数。
4.最后,所有的请求都已处理完毕,SAPI也准备关闭了,PHP开始执行第二步:PHP调用每个扩展的MSHUTDOWN方法,这是各个模块最后一次释放内存的机会
以上是运行在Apache服务中,而Nginx+FastCgi似乎不是这样,这一点我会后期深究,今天主要探讨日志功能,便也后期学习
首先我们按照我的这篇博文(在Linux下编写php扩展)生成一个扩展
然后我们在myext.c文件中添加一个日志函数,然后分别在
PHP_MINIT_FUNCTION,PHP_MSHUTDOWN_FUNCTION,PHP_RINIT_FUNCTION,PHP_RSHUTDOWN_FUNCTION四个函数中添加调用日志的函数
然后编译扩展,重新服务,允许等操作,看看是否有日志
下面我给出一个完整的文件
1 /* 2 +----------------------------------------------------------------------+ 3 | PHP Version 5 | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1997-2016 The PHP Group | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 3.01 of the PHP license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.php.net/license/3_01.txt | 11 | If you did not receive a copy of the PHP license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@php.net so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Author: | 16 +----------------------------------------------------------------------+ 17 */ 18 19 /* $Id$ */ 20 21 #ifdef HAVE_CONFIG_H 22 #include "config.h" 23 #endif 24 25 #include "php.h" 26 #include "php_ini.h" 27 #include "ext/standard/info.h" 28 #include "php_myext.h" 29 30 /* If you declare any globals in php_myext.h uncomment this: 31 ZEND_DECLARE_MODULE_GLOBALS(myext) 32 */ 33 34 /* True global resources - no need for thread safety here */ 35 static int le_myext; 36 void save_log(); 37 /* {{{ PHP_INI 38 */ 39 /* Remove comments and fill if you need to have entries in php.ini 40 PHP_INI_BEGIN() 41 STD_PHP_INI_ENTRY("myext.global_value", "42", PHP_INI_ALL, OnUpdateLong, global_value, zend_myext_globals, myext_globals) 42 STD_PHP_INI_ENTRY("myext.global_string", "foobar", PHP_INI_ALL, OnUpdateString, global_string, zend_myext_globals, myext_globals) 43 PHP_INI_END() 44 */ 45 /* }}} */ 46 47 /* Remove the following function when you have successfully modified config.m4 48 so that your module can be compiled into PHP, it exists only for testing 49 purposes. */ 50 51 /* Every user-visible function in PHP should document itself in the source */ 52 /* {{{ proto string confirm_myext_compiled(string arg) 53 Return a string to confirm that the module is compiled in */ 54 PHP_FUNCTION(confirm_myext_compiled) 55 { 56 char *arg = NULL; 57 int arg_len, len; 58 char *strg; 59 60 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &arg, &arg_len) == FAILURE) { 61 return; 62 } 63 64 len = spprintf(&strg, 0, "Congratulations! You have successfully modified ext/%.78s/config.m4. Module %.78s is now compiled into PHP.", "myext", arg); 65 RETURN_STRINGL(strg, len, 0); 66 } 67 68 void save_log(char *str) 69 { 70 time_t rawtime; 71 struct tm * timeinfo; 72 time ( &rawtime ); 73 timeinfo = localtime ( &rawtime ); 74 75 char buf[512]; 76 sprintf(buf, "%s", asctime (timeinfo)); 77 78 79 FILE *fp = fopen("/Users/zongshuai/log/c.log", "a+"); 80 ////这里写一个绝对路径,请改成一下,大家还得注意权限问题,如果发现打印不出内容,检查一下权限 81 if (fp==0) { 82 printf("can‘t open file\n"); 83 return; 84 } 85 86 strcat(str,"\r\n"); 87 88 fseek(fp, 0,SEEK_END); 89 fwrite(buf, strlen(buf) - 1, 1, fp); 90 fwrite(" ", 4, 1, fp); 91 fwrite(str, strlen(str) * sizeof(char), 1, fp); 92 fclose(fp); 93 return; 94 } 95 96 PHP_FUNCTION(sum_two_num) 97 { 98 long x,y,z; 99 100 if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ll", &x,&y) == FAILURE) {101 RETURN_FALSE;102 }103 104 char str[80] = "EXECED MYFUNCTION";105 save_log(str);106 107 z = x * y;108 109 RETURN_LONG(z);110 }111 /* }}} */112 /* The previous line is meant for vim and emacs, so it can correctly fold and 113 unfold functions in source code. See the corresponding marks just before 114 function definition, where the functions purpose is also documented. Please 115 follow this convention for the convenience of others editing your code.116 */117 118 119 /* {{{ php_myext_init_globals120 */121 /* Uncomment this function if you have INI entries122 static void php_myext_init_globals(zend_myext_globals *myext_globals)123 {124 myext_globals->global_value = http://www.mamicode.com/0;>125 myext_globals->global_string = NULL;126 }127 */128 /* }}} */129 130 /* {{{ PHP_MINIT_FUNCTION131 */132 PHP_MINIT_FUNCTION(myext)133 {134 /* If you have INI entries, uncomment these lines 135 REGISTER_INI_ENTRIES();136 */137 char str[80] = "EXECED PHP_MINIT_FUNCTION";138 save_log(str);139 return SUCCESS;140 }141 /* }}} */142 143 /* {{{ PHP_MSHUTDOWN_FUNCTION144 */145 PHP_MSHUTDOWN_FUNCTION(myext)146 {147 /* uncomment this line if you have INI entries148 UNREGISTER_INI_ENTRIES();149 */150 char str[80] = "EXECED PHP_MSHUTDOWN_FUNCTION";151 save_log(str);152 return SUCCESS;153 }154 /* }}} */155 156 /* Remove if there‘s nothing to do at request start */157 /* {{{ PHP_RINIT_FUNCTION158 */159 PHP_RINIT_FUNCTION(myext)160 {161 char str[80] = "EXECED PHP_RINIT_FUNCTION";162 save_log(str);163 return SUCCESS;164 }165 /* }}} */166 167 /* Remove if there‘s nothing to do at request end */168 /* {{{ PHP_RSHUTDOWN_FUNCTION169 */170 PHP_RSHUTDOWN_FUNCTION(myext)171 {172 char str[80] = "EXECED PHP_RSHUTDOWN_FUNCTION";173 save_log(str);174 return SUCCESS;175 }176 /* }}} */177 178 /* {{{ PHP_MINFO_FUNCTION179 */180 PHP_MINFO_FUNCTION(myext)181 {182 php_info_print_table_start();183 php_info_print_table_header(2, "myext support", "enabled");184 php_info_print_table_end();185 186 /* Remove comments if you have entries in php.ini187 DISPLAY_INI_ENTRIES();188 */189 }190 /* }}} */191 192 /* {{{ myext_functions[]193 *194 * Every user visible function must have an entry in myext_functions[].195 */196 const zend_function_entry myext_functions[] = {197 PHP_FE(confirm_myext_compiled, NULL) /* For testing, remove later. */198 PHP_FE(sum_two_num, NULL)199 PHP_FE_END /* Must be the last line in myext_functions[] */200 };201 /* }}} */202 203 /* {{{ myext_module_entry204 */205 zend_module_entry myext_module_entry = {206 STANDARD_MODULE_HEADER,207 "myext",208 myext_functions,209 PHP_MINIT(myext),210 PHP_MSHUTDOWN(myext),211 PHP_RINIT(myext), /* Replace with NULL if there‘s nothing to do at request start */212 PHP_RSHUTDOWN(myext), /* Replace with NULL if there‘s nothing to do at request end */213 PHP_MINFO(myext),214 PHP_myext_VERSION,215 STANDARD_MODULE_PROPERTIES216 };217 /* }}} */218 219 #ifdef COMPILE_DL_myext220 ZEND_GET_MODULE(myext)221 #endif222 223 /*224 * Local variables:225 * tab-width: 4226 * c-basic-offset: 4227 * End:228 * vim600: noet sw=4 ts=4 fdm=marker229 * vim<600: noet sw=4 ts=4230 */
使用日志记录功能查看PHP扩展的执行过程