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PHP - Random String? (noob Question :p)
Hi everyone
Well I've started learning php yesterday and now I encountered my first problem, I looked around but I don't really know what to search for if I want my answer so here I come Code: [Select] <html> <body> <?php $names = array('Peter','Quagmire','Joe'); $ages = array("Peter"=>32, "Quagmire"=>30, "Joe"=>34); $who = rand(0,2); $who2 = $names[$who]; echo "$names[$who] is $ages[$who2] years old"; ?> </body> </html> This is the script I have, and there is the kind of script I expected: Code: [Select] <html> <body> <?php $names = array('Peter','Quagmire','Joe'); $ages = array("Peter"=>32, "Quagmire"=>30, "Joe"=>34); $who = rand('Peter','Quagmire','Joe'); echo "$who is $ages[$who] years old"; ?> </body> </html> But after some search I concluded that rand is only used for random numbers So, my question is, which function should I use to achieve my goal? Is there any randstring('string1','string2',etc) command? Tnx for your time Similar TutorialsHi, I'm having trouble generating random string with 8 characters, when I refresh I sometimes get 6 characters and sometimes 8. "-" not included as character. Wrong: 6JW-F7W Correct: (should always generate random like this) DVMF-F36V I know I'm trying to achieve this in wrong methods but it's the only way I know. Hope someone can help. function getReference() { $length = 8; $characters = "0123456789abcdefghijklmnopqrstuvwxyz"; for ($p = 0; $p < $length; $p++) { $string .= $characters[mt_rand(0, strlen($characters))]; } return strtoupper(substr($string, 0, -$length/2)."-".substr($string, $length/2-1, -1)); } Hi all i have a silly noob question.... When i directly query my database with the following i get the exact result i want....... Code: [Select] SELECT * FROM posts WHERE postTopic=3 AND postSubject=business; However when i try this using the following PHP....... $sql = "SELECT * FROM posts WHERE postTopic =" . mysql_real_escape_string($_GET['id']) . "AND postSubject='" . $_SESSION[forum] . "'"; I get no result I also get the correct results from $sql = "SELECT * FROM posts WHERE postTopic =" . mysql_real_escape_string($_GET['id']) . "; and $sql = "SELECT * FROM posts WHERE postSubject='" . $_SESSION[forum] . "'"; mysql_real_escape_string($_GET['id']) is an integer and $_SESSION[forum] is a string. I know this has something to do with the manner in which the query is passed with the AND and the string but i can't for the life of my work out where i am going wrong. Thanks for any help. So I found this code from someone else on here who posted about creating a random string. I've copied the code for myself but when I upload php page to my server and view source... there is no php code. Essentially, i see no randomly generated text. what am i missing? Code: [Select] <?php function genRandomString() { $length = 5; $characters = array_merge(range(0,9),range('a','z'),range('A','Z')); $string = ""; for ($p = 0; $p < $length; $p++) { $string .= $characters[mt_rand(0, count($characters)-1)]; } return $string; } ?> i have to tables... forums & subscription i would like to insert a random character string into 'forums' to be used as a subscription id. and then have the same random string to be inserted into 'subscription' I'm looking for a function that creates a random string that contains random letters, numbers and symbols. Also it needs to generate it in a way that there are no repeating characters. Any ideas? Hey all, I'm looking to produce a random 10 character string like: abcABC0123 when the below method is called: <?php function randomize(){ $chars = explode(' ',(range("a","z"))) . explode(' ',(range("A","Z"))) . explode(' ',(range("0","9"))); $pass = ""; for($i = 0; $i < $len; $i += 1){ array_push($pass,$chars[rand(count($chars)-1)]); } return $pass; } var_dump(randomize(10)); ?> But the randomize method is not returning desired result. Any idea what I'm doing wrong? Thanks for response. In the PHP script I'm using, in the Upload Form the user selects an image to Upload, the Form renames it like so:
$allowedExts = array("gif", "jpeg", "jpg", "pdf", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = strtolower( end($temp) );
if (!in_array($extension,$allowedExts))
{
echo ("Error - Invalid File Name");
}
$length = 20;
$randomString = (time());
$thumbnail = $randomString . "." . $extension;
The random string works successfully, but I'd like to add the user_id to the beginning of it and a dash, like this:
user_id -
So, the new file name would be something like: user_id-randomString.extension
Can you please help me add that?
OK, so I have a question about databases and how they sort things being loaded into them. I have a database that I have images uploaded to (some people dont like to do it this way but this is what is going to work for my project). I have it set up with an id column that auto-increments. When I upload the files for some reason it is putting the highest id number first and the second one is the lowest then it goes in order from there. Why would this be happening and how do I correct it? I'm really sorry if this has been answered (I assume it has) I'm unfamiliar with search terms of what I am trying to do. I have this web page Code: [Select] <html> <body> <?php $con = mysql_connect("localhost","user","pass"); if (!$con) { echo "Fail"; die('Could not connect: ' . mysql_error()); } echo "Triumph"; ?> </body> </html> Which I got from a snippet. I load the webpage expecting to see fail or triumph, but I see nothing. My question is how to run the php script so I see something on the page (hopefully triumph. I apoligise for my noobness, I'm a PHP know nothing at the moment. But how do I check input to make sure that the input has to be seperated by commas and has to be a integer like "1,2,3,4,5" is correct if a user puts "1,:25,,l2@" or something funky, I can error out Thanks also is there a php function that does this already? and is this way safe? im trying to store comma seperated id's OK so sorry if my understandings a bit off, but if a I want to introduce a class into my doc is the best way to fo this with the include() function? I hope no one rolls their eyes at me, lol, but I literally, just made my first PHP script, but I ran into a snag.
Okay so the code I did was
<!DOCTYPE html> <html> <body> <?php echo <h1>"my First PHP script"</h1>; ?> </body> </html> but in firefox the outcome is always "my first PHP script?> I had added the h1 tags because it wouldn't print at all before I did. I'm trying to figure out what I did wrong. Long story short i'm paginating database results. So pages = results / res-per-page-limit but 28 / 10 will be 2.8 should i use round() or ceil()? currently using function gen_chars($length = 6) { // Available characters $chars = '0123456789abcdefghjkmnoprstvwxyz'; $Code = ''; // Generate code for ($i = 0; $i < $length; ++$i) { $Code .= substr($chars, (((int) mt_rand(0,strlen($chars))) - 1),1); } return $Code; } // Usage $var = gen_chars(12); echo $var; However ide like to know if theres a more efficient way of generating this since this is going to be using a lot. Thanks So I'm using simplexml_load_file($url) to load up a client's XML file so I can use it with a jQuery slide show right. My problem is that some of the strings within the xml files are often times sentences and when I echo, for example... Code: [Select] echo $xml->images->categories->category[$gallery]->images->image[0]->description[0]; I should see Dream as if you'll live forever, Live as if you'll die today but all I'm getting is Dream as if you It appears as though php is getting confused when it sees those little single quotes. Anyone? hey guys! I just got started with php (yesterday) and im currently trying to write a script that cuts email signatures off. The first filter ($sig[0]) works fine, the string is cut and posted- and, well, that's it. I think i did sth wrong within the for- but i cant find it. So please help me out. A hint would be fine already. Thanks in advance- and here is some code: Code: [Select] <?php $string="TESTSTRING!! I AM AN EMAIL TEXT!!! SO RANDOM! --- I AM A SIGNATURE!! HERP DERP CUT ME OFF"; //define possible sig starts (=filter) $sig[0]=("#=="); $sig[1]=("---"); $sig[2]=("the name of an enterprise"); $sig[3]=("___"); for ($i=0; $i<=3; $i++) { /* or count($sig) ? */ $sigpos=strpos($string,$sig[$i]); if($sigpos>0) { $string= substr($string,0,$sigpos); break; echo $string; } else { echo $string; break; } } ?> <br> <? //show where the sig is cut off echo $sigpos; ?> I'm almost embarrassed to ask such a simple question but I just cannot get this to work. I'm trying to figure out how to use sessions that takes the information from a form on the first page and displays it on the last. I have this on page 1: <?php session_start(); ?> <form action="test2.php" method="post"> <p>Page 1</p> <p>First Name <input type="text" name="first" /></p> <p><input type="submit" value="Next page 2" /></p> And this for page 2: <?php SESSION_START(); $_SESSION['first'] = $_POST['first']; echo $_SESSION['first'] = $_POST['first']; ?> <form action="test3.php" method="post"> <p>Page 2</p> <input type="submit" value="Next page 3" /> </form> And this for page 3: <?php SESSION_START(); $_SESSION['first'] = $_POST['first']; echo $_SESSION['first'] = $_POST['first']; ?> <p>Page 3</p> <p>You're done</p> I can get it to display on page 2 but not on page 3. Can anyone tell me why? I've been at this for a long time and it should be simple but I cannot get it to work. Thanks in advance. Hello everyone! I'm completely new to PHP and Databases. I've managed to do some nice work by reading, but now I've encountered a problem I can't solve. I made a site with trailers and got tierd of adding them manually. So I created a form which sends the trailer info to my database. There's now trailers in specific organized genres. But the list is beginning to get really big so I wanted to show just 10 trailers per page. And so I found out I could use a paging system which I ALMOST got working. Just one last thing that needs to be fixed and that is when I click on next page "http://www.xxxxxxxx.com/test.php&page=2" it doesn't show the content. While "http://www.xxxxxxxx.com/test.php" does. So I just need that next button to work, I don't know if theres something missing or what it is... Note: I'm new to all this so please excuse my very very bad coding. Here is my code: test.php <link rel="stylesheet" type="text/css" media="all" href="http://www.xxxxxxxxxxxxx.n.nu/createdfiles/trailers/style-twentyten.css" /> <link rel="stylesheet" type="text/css" media="all" href="http://www.xxxxxxxxxxxxx.com/paginate.css" /> <?php $rpp = 10; // results per page $adjacents = 4; $page = intval($_GET["page"]); if(!$page) $page = 1; $reload = $_SERVER['PHP_SELF']; // connect to your DB: $link_id = mysql_connect("server","username","my password"); mysql_select_db("database"); // select appropriate results from DB: $sql = "SELECT * FROM blablabla WHERE Genre LIKE '%Drama%' ORDER BY `blablabla`.`sort` DESC LIMIT 0, 9999"; $result = mysql_query($sql, $link_id); // count total number of appropriate listings: $tcount = mysql_num_rows($result); // count number of pages: $tpages = ($tcount) ? ceil($tcount/$rpp) : 1; // total pages, last page number $count = 0; $i = ($page-1)*$rpp; while(($count<$rpp) && ($i<$tcount)) { mysql_data_seek($result,$i); $query = mysql_fetch_array($result); // output each row: echo "<br />--------------------------------------------------------------------------------------------------------<br /><br />"; ?><strong> <img src=" <?php echo $query['Poster'];?>" /><?php echo "<br /> <br />"; ////////////////////////////// //SHOW TITLE, YEAR AND GENRE// ////////////////////////////// echo "<H1>"; echo $query['Title']; echo "<br /> <br />"; echo "</h1>"; ?></strong> <?php echo "<H2>"; echo $query['Year']; echo "</H2>"; echo "<br />"; echo "<H3>"; echo $query['Genre']; echo "</H3>"; ?> <a href=" <?php ////////////////////////////// //SHOW IMDB, ACTORS AND PLOT// ////////////////////////////// echo $query['IMDB']; ?> " target="_self">Link to IMDb</a> <?php echo "<br /> <br />"; echo "<H2>Stars:</H2>"; echo "<br />"; echo "<H3>"; echo $query['Actors']; echo "</H3>"; echo "<br />"; echo "<H2>Plot:</H2>"; echo "<br />"; echo "<H3>"; echo $query['Plot']; echo "</H3>"; echo "<br /> <br />"; echo "<H2>"; //////////////// //SHOW TRAILER// //////////////// ?> <div id="<?php echo $query['ID'];?>" style="display: none;"> <?php echo $query['Youtube']; echo "</div>"; ?> <a href="javascript:ReverseDisplay('<?php echo $query['ID'];?>')">Click to show/hide trailer.</a> <?php echo "</H2>"; echo "<br /> <br />"; $i++; $count++; } // call pagination function: include("paginate_one.php"); echo paginate_one($reload, $page, $tpages); ?> <?php //////////////////////////////// //SCRIPT FOR SHOW/HIDE TRAILER// //////////////////////////////// ?> <script type="text/javascript" language="JavaScript"><!-- function HideContent(d) { document.getElementById(d).style.display = "none"; } function ShowContent(d) { document.getElementById(d).style.display = "block"; } function ReverseDisplay(d) { if(document.getElementById(d).style.display == "none") { document.getElementById(d).style.display = "block"; } else { document.getElementById(d).style.display = "none"; } } //--></script> paginate_one.php <?php /************************************************************************* php easy :: pagination scripts set - Version One ========================================================================== Author: php easy code, www.phpeasycode.com Web Site: http://www.phpeasycode.com Contact: webmaster@phpeasycode.com *************************************************************************/ function paginate_one($reload, $page, $tpages) { $firstlabel = "First"; $prevlabel = "Prev"; $nextlabel = "Next"; $lastlabel = "Last"; $out = "<div class=\"pagin\">\n"; // first if($page>1) { $out.= "<a href=\"" . $reload . "\">" . $firstlabel . "</a>\n"; } else { $out.= "<span>" . $firstlabel . "</span>\n"; } // previous if($page==1) { $out.= "<span>" . $prevlabel . "</span>\n"; } elseif($page==2) { $out.= "<a href=\"" . $reload . "\">" . $prevlabel . "</a>\n"; } else { $out.= "<a href=\"" . $reload . "&page=" . ($page-1) . "\">" . $prevlabel . "</a>\n"; } // current $out.= "<span class=\"current\">Page " . $page . " of " . $tpages . "</span>\n"; // next if($page<$tpages) { $out.= "<a href=\"" . $reload . "&page=" .($page+1) . "\">" . $nextlabel . "</a>\n"; } else { $out.= "<span>" . $nextlabel . "</span>\n"; } // last if($page<$tpages) { $out.= "<a href=\"" . $reload . "&page=" . $tpages . "\">" . $lastlabel . "</a>\n"; } else { $out.= "<span>" . $lastlabel . "</span>\n"; } $out.= "</div>"; return $out; } ?> Here you can view a test of it all in action: http://www.mansgullberg.com/test.php please dont hack my site I'm thankfull for all of your answers! Really nice forum this! /kvickan Hi guys, Sorry - I know this is a basic question but I've been out of the game for a year now and need to jog my memory. I am trying to count the number of rows per group. e.g: $sql = "SELECT *, COUNT(id) FROM image GROUP BY city"; $result = mysql_query($sql); $row = mysql_fetch_assoc($result); echo $row['COUNT(id)']; So if there are, for example, 5 New York's in the table, 3 London's and 2 Sydney's I want the echo to display 5, 3, 2 Should I use a loop for this? Cheers Hello there. I used this code so many times long ago, but I still don't remeber and don't know what I'm doing wrong. http://circus.ka-blooey.net/ If I try to click on any link below the post, I got the error: Code: [Select] Warning: include(.php) [function.include]: failed to open stream: No such file or directory in /home/kablooey/public_html/circus/index.php on line 5 Warning: include(.php) [function.include]: failed to open stream: No such file or directory in /home/kablooey/public_html/circus/index.php on line 5 Warning: include() [function.include]: Failed opening '.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/kablooey/public_html/circus/index.php on line 5 -----------------------x My index is: Code: [Select] <?php include("header.php"); ?> <? if (empty($_GET["boo"])) {$boo="news/show_news";} include "$boo.php"; ?> <?php include("footer.php"); ?> and the footer, where the links are is: Code: [Select] <br /> <div id="menu"><center><a href="http://circus.ka-blooey.net">clear</a> ---x--- <a href="?boo=out">links out</a> ---x--- <a href="?boo=credits">credits</a></center></div><br /> <br /> <br /> <div id="footer"><img src="http://circus.ka-blooey.net/layout/circus_footer.jpg" /></div> </div> </div> </div> </body> </html> Help please? =/ |
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