php - ob_get_clean，只工作两次

Question

采用这个简单的脚本:

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);

这个输出:

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

要正确地执行此操作，您应该在 ob_get_clean() 之后执行 ob_start()

<?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);
?>