深入理解php中ob_flush與flush的差別
-
- ob_start();
- echo '1';
- ob_flush();//输出php缓存并刷新
- echo '2';
- ob_flush();//输出php缓存并刷新
- $cc = ob_get_contents();
- ob_end_clean();
- var_dump($cc);
- ?>
复制代码
输出:
12string(0) ""
测试2:
-
- ob_start();
- echo '1';
- flush(); //输出apache缓存并刷新
- echo '2';
- flush(); //输出apache缓存并刷新
- $cc = ob_get_contents();
- ob_end_clean();
- var_dump($cc);
- ?>
复制代码
输出:
string(2) "12"
测试3:
-
- ob_start();
- echo '1';
- ob_flush();//输出php缓存并刷新
- flush();//输出apache缓存并刷新
- echo '2';
- ob_flush();//输出php缓存并刷新
- flush();//输出apache缓存并刷新
- $cc = ob_get_contents();
- ob_end_clean();
- var_dump($cc);
- ?>
复制代码
输出:
12string(0) ""
测试4,
-
- ob_start();
- echo '1';
- flush();//输出apache缓存并刷新
- ob_flush();//输出php缓存并刷新
- echo '2';
- flush();//输出apache缓存并刷新
- ob_flush();//输出php缓存并刷新
- $cc = ob_get_contents();
- ob_end_clean();
- var_dump($cc);
- ?>
复制代码
输出:
12string(0) ""
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