LXXII. Output Control Functions
The Output Control functions allow you to control when output is sent from the script.
This can be useful in several different situations, especially if you need to send headers to the
browser after your script has began outputting data. The Output Control functions do not affect
headers sent using header() or setcookie(), only functions such as echo() and data between blocks of PHP code.
|
Example 1. Output Control example
<?php
ob_start();
echo "Hello\n";
setcookie ("cookiename", "cookiedata");
ob_end_flush();
?>
|
|
In the above example, the output from echo() would
be stored in the output buffer until ob_end_flush()
was called. In the mean time, the call to setcookie()
successfully stored a cookie without causing an error. (You can not normally send headers to the
browser after data has already been sent.)
See also header() and setcookie().
- Table of Contents
- flush -- Flush the output buffer
- ob_start -- Turn on output buffering
- ob_get_contents -- Return the contents
of the output buffer
- ob_get_length -- Return the length of the
output buffer
- ob_get_level -- Return the nesting level of
the output buffering mechanism
- ob_gzhandler -- ob_start callback function
to gzip output buffer
- ob_flush -- Flush (send) the output buffer
- ob_clean -- Clean (erase) the output
buffer
- ob_end_flush -- Flush (send) the output
buffer and turn off output buffering
- ob_end_clean -- Clean (erase) the output
buffer and turn off output buffering
- ob_implicit_flush -- Turn implicit
flush on/off
|
