ob_get_clean，只能两次

Question

就拿这个简单的脚本：

ob_start(); 
$text = array(); 

echo 'first text'; 
$text[] = ob_get_clean(); 

echo 'second text'; 
$text[] = ob_get_clean(); 

echo 'third text'; 
$text[] = ob_get_clean(); 

echo 'fourth text'; 
$text[] = ob_get_clean(); 

print_r($text); 

此输出：

third textfourth textArray 
(
    [0] => first text 
    [1] => second text 
    [2] => 
    [3] => 
) 

但我希望：

Array 
(
    [0] => first text 
    [1] => second text 
    [2] => third text 
    [3] => fourth text 
) 

PHPFiddle

Answer 1

要做到这一点正确你应该后ob_get_clean()

<?php 
ob_start(); 
$text = array(); 

echo 'first text'; 
$text[] = ob_get_clean(); 
ob_start(); 

echo 'second text'; 
$text[] = ob_get_clean(); 

ob_start(); 

echo 'third text'; 
$text[] = ob_get_clean(); 

ob_start(); 

echo 'fourth text'; 
$text[] = ob_get_clean(); 

print_r($text); 
?> 

Answer 2

做ob_start()您需要再次每次调用ob_get_clean()之前调用ob_start()。

ob_start(); 
$text = array(); 

echo 'first text'; 
$text[] = ob_get_clean(); 

ob_start(); 
echo 'second text'; 
$text[] = ob_get_clean(); 

ob_start(); 
echo 'third text'; 
$text[] = ob_get_clean(); 

ob_start(); 
echo 'fourth text'; 
$text[] = ob_get_clean(); 

print_r($text); 

Answer 3

ob_get_clean关闭输出缓冲。它应该只给你第一个。它显示了两个，因为你有第二层输出缓冲活动。

尝试使用：

$text[] = ob_get_contents(); 
ob_clean(); 

Answer 4

从php.org：

ob_get_clean（）执行基本都ob_get_contents（）和ob_end_clean（）。

ob_get_clean()

当ob_end_clean（）被调用时，它关断缓冲。您需要再次调用ob_get_start（），才能恢复缓冲。