清除回显项 PHP

Question

我可以清除所有（已经）回显或打印的项目吗？我不是在寻找输出缓冲。我正在寻找替代品。

举个例子：

<?php

echo 'a';
print 'b';

The code I need

echo 'c';

The first two statements (echo and print) should not be present in the output
?>

Answer 1

不，无论您写出什么，都会发送到网络服务器，网络服务器再将其发送到浏览器。然而，PHP 中有一个名为 output buffering 的模块（暂时）解耦输出流。

查看 ob_start() 和 ob_end_clean()

<?PHP

ob_start(); // output buffering enabled

// these echos will be buffered in memory, instead of written out as they usually would:
echo 'A';
echo 'B';
echo 'C';

// now we've moved the buffer into `$html` (so that now contains 'ABC'), and we've stopped output buffering.
$html = ob_get_clean();

echo 'D'; // this is being send to the client/webbrowser as usual

echo $html; // now we print the ABC we intercepted earlier


So the client will receive : D A B C

清除回显项 PHP

Clear echoed items PHP

php

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