#38970 [Fbk->Bgs]: weird skip so that $array[0] is missed

ID: 38970 Updated by: mgf@php.net Reported By: jlindenbaum at gawsolutions dot com -Status: Feedback +Status: Bogus Bug Type: Scripting Engine problem Operating System: Cent OS 4.3 PHP Version: 4.4.4 New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. This sounds like an auto-type-conversion issue -- you need to use identity tests instead of equality. (Further Hint: by definition, "submit"==0, but "submit"!==0). Previous Comments: ------------------------------------------------------------------------ [2006-09-27 07:07:03] derick@php.net Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2006-09-27 03:07:52] jlindenbaum at gawsolutions dot com Sorry, another update. We just found the weirdest work around. the echo the checkbox: echo "\t<input type=\"checkbox\" name=\"1".$key."\" value=\"".$value."\" /> ".$value if we add the one before the $key in nam="" so that the $_POST array starts at 10 it works fine. ------------------------------------------------------------------------ [2006-09-27 03:05:06] jlindenbaum at gawsolutions dot com Sorry entered wrong OS version. Changed from 4.2 to 4.3 ------------------------------------------------------------------------ [2006-09-27 03:00:07] jlindenbaum at gawsolutions dot com Description: ------------ Reading files from a directory, stripping "." and "..". Sorting array by values (using sort()). foreach() is used to output a checkbox for each file (cPanel user file). When user is checked chosen action (from the radio buttons) is to be applied (with system command) by executing the command in action with the appropriate username trailing. foreach() is used to go through every $_POST value with an if() the $keys "action" and "submit" are excluded from execution. A bash command is put together and finally executed. Everything works as it should, except that the array[0] is totally ignored. Reproduce code: --------------- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>User actions</title> </head> <body> <form name="userlist" action="test.php" method="post"> <input type="radio" name="action" value="/scripts/pkgacct" checked="checked" />Backup <input type="radio" name="action" value="/scripts/suspendacct" />Suspend <input type="radio" name="action" value="/scripts/unsuspendacct" />Unsuspend <input type="radio" name="action" value="/scripts/killacct" />Delete <br /> <?php $handle = opendir("/var/cpanel/users/"); $usrarr = array(); // Array full of users while( FALSE !== ($users = readdir($handle)) ) { if( $users != "." && $users != ".." ) { $usrarr[] = $users; } } sort($usrarr); // sort alphabetically foreach($usrarr as $key => $value) { echo "\t<input type=\"checkbox\" name=\"".$key."\" value=\"".$value."\" /> ".$value."<br />\n"; } closedir($handle); ?> <input name="submit" type="submit" id="submit" value="GO"> </form> <?php if( isset($_POST['submit']) ) { echo "<hr noshade=\"noshade\" />"; // output a horizontal rule for clearance echo "<pre>"; foreach( $_POST as $key => $value ) { if( $key != "submit" && $key != "action" ) { $bash = $_POST['action']." ".$value; // put together /path/command username echo "Processing: ".$value."<br />\n"; system($bash); echo "Done<br />\n"; } } echo "<pre>"; } ?> </body> </html> Expected result: ---------------- Expected result is that every $_POST key (0 through n) should be put together with the $_POST['action'] command and a username, executed and on to the next. Actual result: -------------- It works for every user, BUT the $usrarr[0] key and value. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=38970&edit=1