Is it possible to add a time delay in PHP?

TheJeffsta

TheJeffsta

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When ever I make thumbnails, I can make them in a batch of 20 but after the 2nd or 3rd go I end up getting suspended.

I was wondering if it would be possible to add some sort of delay in the script so that I could select to do them all, and it does like 1 - 2 every 5 - 10 minutes or something.

The 'if ($action == "createthumbnails") {' seems to be where the conversion starts, but not entirely sure.

I have the following code:

PHP: 
<?php
/**************************************************************************
 *                                                                        *
 *    4images - A Web Based Image Gallery Management System               *
 *    ----------------------------------------------------------------    *
 *                                                                        *
 *             File: thumbnailer.php                                      *
 *        Copyright: (C) 2002 Jan Sorgalla                                *
 *            Email: jan@4homepages.de                                    * 
 *              Web: http://www.4homepages.de                             * 
 *    Scriptversion: 1.7.6                                                *
 *                                                                        *
 *    Never released without support from: Nicky (http://www.nicky.net)   *
 *                                                                        *
 **************************************************************************
 *                                                                        *
 *    Dieses Script ist KEINE Freeware. Bitte lesen Sie die Lizenz-       *
 *    bedingungen (Lizenz.txt) für weitere Informationen.                 *
 *    ---------------------------------------------------------------     *
 *    This script is NOT freeware! Please read the Copyright Notice       *
 *    (Licence.txt) for further information.                              *
 *                                                                        *
 *************************************************************************/

$nozip = 1;
define('IN_CP', 1);
define('ROOT_PATH', './../');
require('admin_global.php');
require(ROOT_PATH.'includes/image_utils.php');

if ($action == "") {
  $action = "checkthumbnails";
}

show_admin_header();

$convert_options = init_convert_options();
if ($convert_options['convert_error']) {
  echo $convert_options['convert_error'];
  show_admin_footer();
  exit;
}

if ($action == "createthumbnails") {
  $dimension = (isset($HTTP_POST_VARS['dimension']) && intval($HTTP_POST_VARS['dimension'])) ? intval($HTTP_POST_VARS['dimension']) : 100;
  $resize_type = (isset($HTTP_POST_VARS['resize_type']) && intval($HTTP_POST_VARS['resize_type'])) ? intval($HTTP_POST_VARS['resize_type']) : 1;
  $quality = (isset($HTTP_POST_VARS['quality']) && intval($HTTP_POST_VARS['quality']) && intval($HTTP_POST_VARS['quality']) <= 100) ? intval($HTTP_POST_VARS['quality']) : 100;
  $image_list = (isset($HTTP_POST_VARS['image_list'])) ? $HTTP_POST_VARS['image_list'] : "";

  if (!empty($image_list)) {
    $image_id_sql = "";
    foreach ($image_list as $key => $val) {
      if ($val == 1) {
        $image_id_sql .= (($image_id_sql != "") ? ", " : "" ).$key;
      }
    }

    $sql = "SELECT image_id, cat_id, image_name, image_media_file, image_thumb_file
            FROM ".IMAGES_TABLE."
            WHERE image_id IN($image_id_sql)";
    $result = $site_db->query($sql);

    $image_cache = array();
    while ($row = $site_db->fetch_array($result)) {
      $image_cache[$row['image_id']] = $row;
    }

    foreach ($image_list as $key => $val) {
      if ($val == 1) {
        echo "<p>".$lang['creating_thumbnail'].format_text($image_cache[$key]['image_name'], 2)." (".$image_cache[$key]['image_media_file'].") ....&nbsp;&nbsp;\n";
        flush();
        @set_time_limit(90);
        if (create_thumbnail(MEDIA_PATH."/".$image_cache[$key]['cat_id']."/".$image_cache[$key]['image_media_file'], THUMB_PATH."/".$image_cache[$key]['cat_id']."/".$image_cache[$key]['image_media_file'], $quality, $dimension, $resize_type)) {
          $sql = "UPDATE ".IMAGES_TABLE."
                  SET image_thumb_file = '".addslashes($image_cache[$key]['image_media_file'])."'
                  WHERE image_id = $key";
          $site_db->query($sql);

          echo "<br />&nbsp;&nbsp;&nbsp;<b>".$lang['creating_thumbnail_success']."</b><p>";
        }
        else {
          echo "<br />&nbsp;&nbsp;&nbsp;<b class=\"marktext\">".$lang['creating_thumbnail_error']."</b><p>";
        }
      }
    }
  }
  else {
    echo "<b>Just relaxing because you give me nothing to do!</b>";
  }
}

if ($action == "checkthumbnails") {
  $num_newimages = (isset($HTTP_POST_VARS['num_newimages']) && intval($HTTP_POST_VARS['num_newimages'])) ? intval($HTTP_POST_VARS['num_newimages']) : 10;

  show_form_header("thumbnailer.php", "checkthumbnails");
  show_table_header($lang['check_thumbnails'], 2);
  $desc = $lang['check_thumbnails_desc'];
  $desc .= "&nbsp;&nbsp;&nbsp;&nbsp;".$lang['num_newimages_desc']."<input type=\"text\" name=\"num_newimages\" value=\"".$num_newimages."\" size=\"5\">";
  show_custom_row($desc, "<input type=\"submit\" value=\"".$lang['check_thumbnails']."\" class=\"button\">");
  show_table_footer();
  echo "</form>";
}

if (isset($HTTP_POST_VARS['action']) && $HTTP_POST_VARS['action'] == "checkthumbnails") {
  $sql = "SELECT image_id, image_name, cat_id, image_media_file, image_thumb_file
          FROM ".IMAGES_TABLE;
  $result = $site_db->query($sql);

  $imgs = "";
  if ($result) {
    $bgcounter = 0;
    $image_counter = 0;
    while ($image_row = $site_db->fetch_array($result)) {
      if ((!file_exists(THUMB_PATH."/".$image_row['cat_id']."/".$image_row['image_thumb_file']) || $image_row['image_thumb_file'] == "") && file_exists(MEDIA_PATH."/".$image_row['cat_id']."/".$image_row['image_media_file'])) {
        $image_info = getimagesize(MEDIA_PATH."/".$image_row['cat_id']."/".$image_row['image_media_file']);
        if ($image_info[2] == 1 || $image_info[2] == 2 || $image_info[2] == 3) {
          $imgs .= "<tr class=\"".get_row_bg()."\">";
          $imgs .= "<td width=\"20%\"><input type=\"checkbox\" name=\"image_list[".$image_row['image_id']."]\" value=\"1\" checked=\"checked\"></td>\n";
          $imgs .= "<td width=\"30%\"><b><a href=\"".$site_sess->url(ROOT_PATH."details.php?".URL_IMAGE_ID."=".$image_row['image_id'])."\" target=_blank>".format_text($image_row['image_name'], 2)."</a></b></td>\n";
          $imgs .= "<td width=\"25%\">".$image_row['image_media_file']."</td>\n";
          $imgs .= "<td width=\"25%\">".format_text($cat_cache[$image_row['cat_id']]['cat_name'], 2)."</td></tr>\n";
          $image_counter++;
        }
      }
      if ($image_counter == $num_newimages) {
        break;
      }
    }
  }
  if (empty($imgs)) {
    echo "<table cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"100%\"><tr><td class=\"tableborder\">\n<table cellpadding=\"3\" cellspacing=\"1\" border=\"0\" width=\"100%\">\n";
    $bgcounter = 0;
    show_description_row($lang['no_search_results'], 4);
    show_table_footer();
  }
  else {
    show_form_header("thumbnailer.php", "createthumbnails", "form");
    echo "<table cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"100%\"><tr><td class=\"tableborder\">\n<table cellpadding=\"3\" cellspacing=\"1\" border=\"0\" width=\"100%\">\n";
    echo "<tr class=\"tableseparator\">\n<td class=\"tableseparator\"><input name=allbox type=checkbox onClick=\"CheckAll();\" checked=\"checked\"></td>\n<td class=\"tableseparator\">".$lang['field_image_name']."</td>\n<td class=\"tableseparator\">".$lang['field_image_file']."</td>\n<td class=\"tableseparator\">".$lang['field_category']."</td>\n</tr>\n";
    echo $imgs;
    show_table_separator($lang['convert_options'], 4);
    echo "<tr class=\"".get_row_bg()."\">\n<td colspan=\"2\"><p class=\"rowtitle\">".$lang['convert_thumbnail_dimension']."</p></td>\n";
    echo "<td colspan=\"2\"><p><input type=\"text\" size=\"$textinput_size\" name=\"dimension\" value=\"100\"></p></td>\n</tr>\n";

    echo "<tr class=\"".get_row_bg()."\">\n<td colspan=\"2\" valign=\"top\"><p class=\"rowtitle\">".$lang['resize_proportions_desc']."</p></td>\n";
    echo "<td colspan=\"2\"><p>";
    echo "<input type=\"radio\" name=\"resize_type\" value=\"1\" checked=\"checked\"> ".$lang['resize_proportionally']."<br />";
    echo "<input type=\"radio\" name=\"resize_type\" value=\"2\"> ".$lang['resize_fixed_width']."<br />";
    echo "<input type=\"radio\" name=\"resize_type\" value=\"3\"> ".$lang['resize_fixed_height']."<br />";
    echo "</p></td>\n</tr>\n";

    echo "<tr class=\"".get_row_bg()."\">\n<td colspan=\"2\"><p class=\"rowtitle\">".$lang['convert_thumbnail_quality']."</p></td>\n";
    echo "<td colspan=\"2\"><p><input type=\"text\" size=\"$textinput_size\" name=\"quality\" value=\"75\"></p></td>\n</tr>\n";
    show_form_footer($lang['create_thumbnails'], "", 4);
  }
}

show_admin_footer();
?>
 
W

woiwky

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Since that script clearly says "This script is NOT freeware!", I'd remove it before a mod on a power trip scolds you :p

Anyway, I believe the real drag occurs within this foreach:

foreach ($image_list as $key => $val) {

Or to be more exact the create_thumbnail() function, considering that it needs to set the max execution time to 90 seconds before it calls that function.

Personally, I think you should be making the thumbnails on your computer rather than on the server. Even if you want to use php for some reason to make them, you should install WAMP or something and use the script on your computer. However, if you really want to, you can delay execution in a couple ways.

One would be to set up a cron to do 1 or 2 images every 5 to 10 minutes like you said, but then you'd have to modify that script so that it no longer relies on post data. To do that, you would probably set up a table in the db with all the data on the images to make thumbnails of.

The other option would be to use the sleep() function. This is less efficient than using a cron, but a lot easier. All you'd have to do is modify the foreach loop to include a sleep() at the end like this:

PHP: 
foreach ($image_list as $key => $val) { 
//all the code here
sleep(300); //300 seconds = 5 minutes
}
 
TheJeffsta

TheJeffsta

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Thanks, will try that.

Its free to download, and since I keep getting suspended with it I need to alter the code, im not onselling or redistributing it ;)

By the way, if I was able to quickly download my whole photo gallery folder then it would be ok to run it on local PC, but downloading 1.3GB at 1 file at a time at 80KB/s (max) is more of a neusense, and then I need to get the thumbnails generated uploaded here - 1 at a time of course.

I vote disable this suspending script until it is finalised and all the creases are worked out.
 
Last edited:
TechAsh

TechAsh

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The PHP sleep function does exactly what you want.

Just put something like this in the code and it'll make PHP sleep for the given number of seconds.
PHP: 
// Make PHP Sleep
// Change 10 to the number of seconds that you want PHP to sleep for.
sleep(10);
 
P

phpasks

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you can used

sleep
usleep both function

also you can use this way

sleep(300); // - 300 meand milisecond stop
@ob_flush();


That's way you can used it - sleep function
 
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