When a PHP script is executed for a long time and it is not clear what it is happening, such as a long loop, a prolonged processing, rainy weather, or other magical things. That is, the desire to see what is happening with the data and at what stage of implementation is a script program. One of the options to use function flush() which clears PHP output buffer and all its contents are sent to the user's browser.<\/p>\n
\r\n<?\r\nheader('Content-Type: text\/plain; charset=utf-8');\r\n\/\/unlimited script run time\r\nset_time_limit(0);\r\n\/\/loop\r\nfor($i=0;$i<1000;$i++){\r\n\t\/\/data output\r\n\techo "\\nloop: $i progress: ".round($i\/10)."%";\r\n\t\/\/clear and send PHP output buffer\r\n\tflush();\r\n\t\/\/pause for clarity\r\n\tusleep(100000);\r\n}\r\n<\/pre>\nAnother option is to use a script to write data to a separate file and load this file from time to time in the browser. You will need to write data file from the script:<\/p>\n
\r\n<?\r\nset_time_limit(0);\r\nfor($i=0;$i<1000;$i++){\r\n\t\/\/writing data to the file log.txt, you need to set file write permissions\r\n\tfile_put_contents('log.txt', "loop: $i<br> progress: ".round($i\/10)."%");\r\n\t\/\/pause for clarity\r\n\tusleep(100000);\r\n}\r\n<\/pre>\nFurther data file will load jQuery load function:<\/p>\n
\r\n<!DOCTYPE HTML>\r\n<html>\r\n<head>\r\n<meta charset="UTF-8" \/>\r\n<title>Progress<\/title>\r\n<script type="text\/javascript" src="http:\/\/ajax.googleapis.com\/ajax\/libs\/jquery\/1.7.1\/jquery.min.js"><\/script>\r\n<script language="javascript" type="text\/javascript">\r\n$(document).ready(function() {\r\nvar reload = setInterval(\r\n\tfunction(){\r\n\t\t\/\/load data from file and display in element id="progress"\r\n\t\t$('#progress').load('log.txt');\r\n\t}, 1000); \/\/every second\r\n});\t\r\n<\/script>\r\n<\/head>\r\n<body>\r\n\t<div id="progress"><\/div>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"When a PHP script is executed for a long time and it is not clear what it is happening, such as a long loop, a prolonged processing, rainy weather, or other magical things. That is, … Continue reading