<?php
function callback($buffer)
{
// replace all the apples with oranges
return (str_replace("apples", "oranges", $buffer));
}
ob_start("callback");
?>
<html>
<body>
<p>It's like comparing apples to oranges.</p>
</body>
</html>
<?php
ob_end_flush();
?>The Output Control functions allow you to control when output is sent from the script. This can be useful in several different situations, especially if you need to send headers to the browser after your script has begun outputting data. The Output Control functions do not affect headers sent using header() or setcookie(), only functions such as echo and data between blocks of PHP code.
Table of Contents
flush — Flush system output buffer
ob_clean — Clean (erase) the output buffer
ob_end_clean — Clean (erase) the output buffer and turn off output buffering
ob_end_flush — Flush (send) the output buffer and turn off output buffering
ob_flush — Flush (send) the output buffer
ob_get_clean — Get current buffer contents and delete current output buffer
ob_get_contents — Return the contents of the output buffer
ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering
ob_get_length — Return the length of the output buffer
ob_get_level — Return the nesting level of the output buffering mechanism
ob_get_status — Get status of output buffers
ob_gzhandler — ob_start callback function to gzip output buffer
ob_implicit_flush — Turn implicit flush on/off
ob_list_handlers — List all output handlers in use
ob_start — Turn on output buffering
output_add_rewrite_var — Add URL rewriter values
output_reset_rewrite_vars — Reset URL rewriter valuesfunction callback($buffer)
{
// replace all the apples with oranges
return (str_replace("apples", "oranges", $buffer));
}
ob_start("callback");