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Using the PHP Output Buffer to Issue JavaScript During Processing
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Using the PHP Output Buffer to Issue JavaScript During Processing
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I have some PHP code that is receiving and processing large images. I'd like to echo out some JavaScript at certain points while the image is being processed to update the DOM with jQuery. Here is some sample code, but it isn't working. It just waits the entire 5 seconds and then makes the alerts happen back to back. I want it to do the first alert immediately and then next alert after 5 seconds.
ob_start();
echo '<script type="text/javascript">alert(\'1...\');</script>';
ob_flush();
sleep(5);
ob_start();
echo '<script type="text/javascript">alert(\'2...\');</script>';
ob_flush();
Can anyone help?
Most browsers buffer content until a certain size is reached. Try making your script blocks longer by padding them with something.
Also: You should call flush, not just ob_flush, and make sure zlib compression is turned off.
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