(PHP 4 >= 4.0.2, PHP 5, PHP 7)
ob_get_length — Return the length of the output buffer
This will return the length of the contents in the output buffer, in bytes.
Returns the length of the output buffer contents, in bytes, 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;
?>
The above example will output:
6, 11