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PHP - Generate Random String
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; } ?> Similar TutorialsHi, I have a script to add images to my tabel and and upload them to my server, I have managed to get the upload script to rename the image with a 5 digit random number on the end to prevent overwriting, the only problem I can't seem to be able to add the same name to my tabel. Any ideas? Thanks in advance. Code: [Select] <?php $idir = "uploads/"; // Path To Images Directory if (isset ($_FILES['fupload'])){ //upload the image to tmp directory $url = $_FILES['fupload']['name']; // Set $url To Equal The Filename For Later Use if ($_FILES['fupload']['type'] == "image/jpg" || $_FILES['fupload']['type'] == "image/jpeg" || $_FILES['fupload']['type'] == "image/pjpeg") { $file_ext = strrchr($_FILES['fupload']['name'], '.'); // Get The File Extention In The Format Of , For Instance, .jpg, .gif or .php $copy = copy($_FILES['fupload']['tmp_name'], $idir. basename($_FILES['fupload']['name'], $file_ext).rand(10000 , 99999).$file_ext); // Move Image From Temporary Location To Perm } } if (isset ($_FILES['fupload2'])){ //upload the image to tmp directory $url = $_FILES['fupload2']['name']; // Set $url To Equal The Filename For Later Use if ($_FILES['fupload2']['type'] == "image/jpg" || $_FILES['fupload2']['type'] == "image/jpeg" || $_FILES['fupload2']['type'] == "image/pjpeg") { $file_ext = strrchr($_FILES['fupload2']['name'], '.'); // Get The File Extention In The Format Of , For Instance, .jpg, .gif or .php $copy = copy($_FILES['fupload2']['tmp_name'], "$idir" . $_FILES['fupload2']['name'] $file_ext).rand(10000 , 99999).$file_ext); // Move Image From Temporary Location To Permanent Location } } if (isset ($_FILES['fupload3'])){ //upload the image to tmp directory $url = $_FILES['fupload3']['name']; // Set $url To Equal The Filename For Later Use if ($_FILES['fupload3']['type'] == "image/jpg" || $_FILES['fupload3']['type'] == "image/jpeg" || $_FILES['fupload3']['type'] == "image/pjpeg") { $file_ext = strrchr($_FILES['fupload3']['name'], '.'); // Get The File Extention In The Format Of , For Instance, .jpg, .gif or .php $copy = copy($_FILES['fupload3']['tmp_name'], "$idir" . $_FILES['fupload3']['name'] $file_ext).rand(10000 , 99999).$file_ext); // Move Image From Temporary Location To Permanent Location } } if (isset ($_FILES['fupload4'])){ //upload the image to tmp directory $url = $_FILES['fupload4']['name']; // Set $url To Equal The Filename For Later Use if ($_FILES['fupload4']['type'] == "image/jpg" || $_FILES['fupload4']['type'] == "image/jpeg" || $_FILES['fupload4']['type'] == "image/pjpeg") { $file_ext = strrchr($_FILES['fupload4']['name'], '.'); // Get The File Extention In The Format Of , For Instance, .jpg, .gif or .php $copy = copy($_FILES['fupload4']['tmp_name'], "$idir" . $_FILES['fupload4']['name'] $file_ext).rand(10000 , 99999).$file_ext); // Move Image From Temporary Location To Permanent Location } } $usr = "user"; $pwd = "pass"; $db = "db"; $host = "host"; # connect to database $cid = mysql_connect($host,$usr,$pwd); if (!$cid) { echo("ERROR: " . mysql_error() . "\n"); } if ($_POST['submit']) { $logo = mysql_real_escape_string("$idir" . $_FILES['fupload']['name']); $image1 = mysql_real_escape_string("$idir" . $_FILES['fupload2']['name']); $image2 = mysql_real_escape_string("$idir" . $_FILES['fupload3']['name']); $image3 = mysql_real_escape_string("$idir" . $_FILES['fupload4']['name']); $SQL = " INSERT INTO mhhire "; $SQL .= " image1, image2, image3, logo) VALUES "; $SQL .= " ('$image1', '$image2', '$image3', '$logo') "; $result = mysql_db_query($db,$SQL,$cid); $last=mysql_insert_id(); if (!$result) { echo("ERROR: " . mysql_error() . "\n$SQL\n"); } header("location:thanks.php"); exit(); } ?> Hi there. I need a function that can generate 15 random numbers between (1,10) and then converts those numbers to Roman numbers. Anyone can help me? How do you generate a random number like say, 0 through 10? I want to select random sites from my database that have IDs 0 through 10. Hi, im trying to apply a random css class to a div so that a random image is generated on each refresh. This is the code i am using to apply the class. Code: [Select] <div class="<?php echo($randomimage); ?>"> Say i have an array of $image1 $image2 $image3 etc, how can i make $randomimage = 1 of these at random on each refresh? I've found lots of tutorials that generate a random number online but none that generate a random variable and am having trouble piecing this together. Any help would be hugely appreciated. Richard Hi All, I created this simple function to generate random doubles..... Please your opinions! function GetRandomFloatNumber($min = false, $max = false, $dec_min = false, $dec_max = false) { // Seed the generator mt_srand((double)microtime()*1000000); // Set the default min and max if no parameter has been passed if ($min === false) $min = 0; if ($max === false) $max = mt_getrandmax(); if ($dec_min === false) $dec_min = 0; if ($dec_max === false) $dec_max = mt_getrandmax(); // units $units = mt_rand($min, $max); // Decimals $decimals = mt_rand($dec_min, $dec_max); // Set double $doublenumber = $units.'.'.$decimals; // Return double return $doublenumber; } How to generate a unique random number in php??? Any one who can help me? This might be a bit hard to explain! I have a grid, 32x32 which is actually 1024 mySQL rows in a table, you can see the table he http://interbitlotto.com/grid each cell is a row in the database, top left is ID 1, bottom right is id 1024. get it? right well its a battle ship game, and im stuck on the automatic battle ship placement script. I have displayed the generated boats as misses so we can see them. The problem i am having, is that the random number generater chooses a cell too close to the side so the boat ends up wrapping to the other side. I cant think of a way to detect if its going to wrap, if it is then choose another cell... The code below chooses the orientation of the boat, then chooses a random cell... but as you can see, no code for "across" to stop it choosing one too close to the side. Any ideas? Code: [Select] $orientation = rand(1,2); //get random orientation - 1 = down, 2 = across. if ($orientation == 1){ $multiply = 32; //cells till next row $max = 1024 - (32 * $boatlength); //prevents it from choosing a cell too close to the bottom $startcell = rand(1,$max); }else{ $multiply = 1; //across, so next cell $max = 1024; $startcell = rand(1,$max); } hi!, is it possible to use rand() to generate unique number that will be saved in a database as a primary key? Since i dont want to have numbers like 00001 incrementing on the table. They dont look like real account numbers... i need something like 45642 or 95452 and the like. thanks in advance. I am looking to generate a random number for every user contribution as a title of the contribution. I could simply check the database each time with a query and generate a number which does not equal to any of the entries of the database. But I imagine this as inefficient and it could become slow if the database is big in my opinion. Also I'd have to contain all the numbers of the database somewhere to manage the "not equals to", in an array or something similar but that can end up as a giant one. Excuse the layman's speech I am new to this. Any suggestions how this can be solved efficiently without straining the resources too much? You can explain it linguistically and do not have to provide me any scripts, I will figure it out. Hello........ Currently i am struggling with php script....... can any one tell me or guide me how to code Automatically generating random number with in the range of 19 to 90 and the number has to change with in 24 hours time duration......... It's urgent........ Thanks in advance..... Rooban.S Hi, What I'm trying to do is create a script that generates a random list of cars whenever it is run. I have a list of available cars in a MySQL database. I'm just not sure how to get php to generate a list of, say, 20 cars, that are randomly picked from the cars in the database. I may also want to add other statistics like MPG (also already in the database). Can anyone show me how to do this? And is it possible to format the returned data in a table or div format? Thanks in advance Unk Hi guys, so i have this file upload script. When i upload a file it gets stored in /uploads and keeps the same file name. So if i upload a file "test.exe" the file will be available at uploads/test.exe
What i want is that it generates a new file name like: "9daln292os.exe" so upload/9daln292os.exe
This is my code:
<?php
// Where the file is going to be placed
$target_path = "uploads/";
/* Add the original filename to our target path.
Result is "uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
$_FILES['uploadedfile']['tmp_name'];
?>
<?php
$file_type = $_FILES['userfile']['type'];
$file_name = $_FILES['userfile']['name'];
$file_ext = strtolower(substr($file_name,strrpos($file_name,".")));
if (!in_array($file_type, $FILE_MIMES) && !in_array($file_ext, $FILE_EXTS) )
$message = "Sorry, $file_name($file_type) is not allowed to be uploaded.";
else
$message = do_upload_function_here($upload_path_here, $upload_ur_upload_url_herel);
?>
<?php
$target_path = "uploads/";
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded. Here is the link to your file: <a href=uploads/". basename( $_FILES['uploadedfile']['name']). ">". basename( $_FILES['uploadedfile']['name'])."</a>";
} else{
echo "There was an error uploading the file, please try again!";
}
?>
I don't know any basic php i really need someone to give me the code ready please. Thanks much appreciated.
Edited by darox, 21 July 2014 - 01:07 PM. Basically I am setting up my own cricket management game, but there are 3 areas that I am slightly stuck on and would appreciate help: 1) When a use registers, I need to create 11 players for their team. For this, I am going to have one text files with first names and one text file with surnames. How can I open each file and select a name and then match them together? 2) I need to create the list of games to be executed at particular times through a cron job. How can I go through all the teams in a table and match them together in games, ensuring everyone plays everyone? If a new player registers, he will be put into a random league and so the games for that league will have to be redone 3) How can I set up a cron job to execute the above games? Each team should play once a day and so if there are 24 teams in a table, there will be 12 games that occur through this cron job. I assume cron jobs are the best thing for this. Any help would be appreciated. Thanks. Hello, Do you guys have any idea how to start an Automatic Order Number System in PHP? I have an service Website, where you can purchase something, and i want after the redirect to "Success.php" to generate an order number, to be shown to the buyer and saved in Date Base for me. Any solutions helps. I´m beginner so don´t mind
Hi, 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)); } 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. 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' 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?
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 |
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