PHP ob_get_level() Function
The PHP ob_get_level() function returns the nesting level of the output buffering mechanism. If the output buffer is not active, it returns zero.
Syntax
ob_get_level()
Parameters
No parameter is required.
Return Value
Returns the level of nested output buffering handlers or zero if output buffering is not active.
Example:
The example below shows the usage of ob_get_level() function.
<?php
echo "Buffer level: ".ob_get_level()."\n";
//adding first output buffer
ob_start();
echo "Buffer level: ".ob_get_level()."\n";
//adding second output buffer
ob_start();
echo "Buffer level: ".ob_get_level()."\n";
//adding third output buffer
ob_start();
echo "Buffer level: ".ob_get_level()."\n";
//flushing and closing all output buffers
while(ob_get_level() != 0) {
ob_end_flush();
}
?>
The output of the above code will be:
Buffer level: 0 Buffer level: 1 Buffer level: 2 Buffer level: 3
❮ PHP Output Control Reference
