PHP Cron Job Flush/OB Flush Needed? -

i have lot of images or will. looking periodically change name of images cron job.

// mysql query -> select images $i = 0; while($i < $num_images){             // update image file name             // update image file name in mysql db $i++; } 

should i, can i, need to, use ob_end_flush(), ob_start(), ob_end_clean() insure correct functionality? i'm not outputting there lot of images.

output buffer have no effect here. output buffers designed control when output (echo or print statements) sent. renaming of image occur execute statement - irregardless of output script sends.

http://php.net/manual/en/intro.outcontrol.php