用C编写你自己的php扩展

function self_concat($string, $n){    $result = "";    for($i = 0; $i   <br> 如果传入的第二个参数N很大，程序的性能如何？我在自己的机器上测试下如果 n=10000000的时候耗时0.6s左右 如果用C写这个php function然后php直接调用，会快么？那就开始写这样一个简单的扩展吧，采用静态编译成.so的方式来加载，我用最快最简明的方式说明。  <p></p>  <p>1.首先你需要有php的源码目录 cd到其ext目录下执行：</p>  <p></p>  <pre name="code" class="sycode">./ext_skel --extname=luckyext --proto=luckyext.def

PHP_FUNCTION(self_concat_c) { char *str = NULL; int argc = ZEND_NUM_ARGS(); int str_len; long n; char *result; /* Points to resulting string */ char *ptr; /* Points at the next location we want to copy to */ int result_length; /* Length of resulting string */ if (zend_parse_parameters(argc TSRMLS_CC, "sl", &str, &str_len, &n) == FAILURE) return; /* Calculate length of result */ result_length = (str_len * n); /* Allocate memory for result */ result = (char *) emalloc(result_length + 1); /* Point at the beginning of the result */ ptr = result; while (n--) { /* Copy str to the result */ memcpy(ptr, str, str_len); /* Increment ptr to point at the next position we want to write to */ ptr += str_len; } /* Null terminate the result. Always null-terminate your strings even if they are binary strings */ *ptr = '\0'; /* Return result to the scripting engine without duplicating it*/ RETURN_STRINGL(result, result_length, 0); } 

phpize./configuremake&&make install

vi /etc/php.iniextension=luckyext.so

killall php-fpmphp-fpm

php -m

<?phpself_concat_c ('fire',10000000);