How Can I Ensure Immediate Output Flushing in PHP for Client-Side Logging?

Immediate Output Flush After Each echo Call

When handling client-side logs in a PHP script, it's crucial to transfer the output immediately after each echo call. However, standard methods like ob_start() and ob_flush() may not always work.

Best Solution

The recommended approach is to specify a character set in the Content-type header and use both ob_flush() and flush(). Here's a sample code snippet:

header( 'Content-type: text/html; charset=utf-8' );
echo 'Begin ...<br />';
for( $i = 0 ; $i < 10 ; $i++ )
{
    echo $i . '<br />';
    ob_flush();
    flush();
    sleep(1);
}
echo 'End ...<br />';

This approach ensures that the output is sent to the client incrementally, eliminating the issue of a blank page while the script processes.

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