(PHP 4 >= 4.0.2, PHP 5)
ob_get_length — Return the length of the output buffer
This will return the length of the contents in the output buffer.
Returns the length of the output buffer contents or FALSE if no buffering is active.
Example #1 A simple ob_get_length() example
<?php
ob_start();
echo "Hello ";
$len1 = ob_get_length();
echo "World";
$len2 = ob_get_length();
ob_end_clean();
echo $len1 . ", ." . $len2;
?>
上例将输出：
6, 11