php性能优化
你的团队成员提出，这些年php引擎已经有很多象征性的性能提升。如果你的web server仍然运行着比较老的版本，如php3或者php4。那么在你尝试着优化你代码之前，应该先深入调查一下版本之间的升级情况。
点击以下链接，可以了解具体细节:
- 输出缓存控制
class dog {
public $name = '';
public function setName($name) {
$this->name = $name;
}
public function getName() {
return $this->name;
}
}
注意：setName()和getName()除了存储和返回name属性外，没做任何工作。
$rover = new dog();
$rover->setName('rover');
echo $rover->getName();
直接设置和访问name属性，性能能提升100%，而且也能缩减开发时间！
$rover = new dog(); $rover->name = 'rover'; echo $rover->name;
$description = strip_tags($_POST['description']); echo $description;
echo strip_tags($_POST['description']);
foreach ($userList as $user) {
$query = 'INSERT INTO users (first_name,last_name) VALUES("' . $user['first_name'] . '", "' . $user['last_name'] . '")';
mysql_query($query);
}
过程：
INSERT INTO users (first_name,last_name) VALUES("John", "Doe")
替换这种循环方案，你能够拼接数据成为一个单一的数据库操作。
$userData = array();
foreach ($userList as $user) {
$userData[] = '("' . $user['first_name'] . '", "' . $user['last_name'] . '")';
}
$query = 'INSERT INTO users (first_name,last_name) VALUES' . implode(',', $userData);
mysql_query($query);
过程:
INSERT INTO users (first_name,last_name) VALUES("John", "Doe"),("Jane", "Doe")...
- MySQL INSERT Syntax
- PHP Memcache module
- Smarty templating engine
- http://3v4l.org --- 分析各个版本间的代码执行效率，非常不错的网站
- http://www.php-internals.com/ ———研究php内核的网站！
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