function randomizeFileName( $real_file_name ) {
$name_parts = @explode( ".", $real_file_name );
$ext = "";
if ( count( $name_parts ) > 0 ) {
$ext = $name_parts[count( $name_parts ) - 1];
}
return substr(md5(uniqid(rand(),1)), -16) . "." . $ext;
}
Set up and array of filenames, which correspond to the file names of the images you are trying to randomize.
<?php
$bg = array('bg-01.jpg', 'bg-02.jpg', 'bg-03.jpg', 'bg-04.jpg', 'bg-05.jpg', 'bg-06.jpg', 'bg-07.jpg' ); // array of filenames
$i = rand(0, count($bg)-1); // generate random number size of the array
$selectedBg = "$bg[$i]"; // set variable equal to which random filename was chosen
?>Normally you'd want to keep CSS out of the HTML, but we'll just use it here to echo out the random file name we selected above.
<style type="text/css">
<!--
body{
background: url(images/<?php echo $selectedBg; ?>) no-repeat;
}
-->
</style>
<?php
$string = "abcdwxyz456789";
for($i=0;$i<25;$i++){
$pos = rand(0,13);
$str .= $string{$pos};
}
echo $str;
?>
Create a text file called slogans.txt with permissions that it can be read by the server. Put each slogan on a different line, e.g.:
Building websites since before there was a web.
The internet is for lovers.
<?php
$f_contents = file ("slogans.txt");
$line = $f_contents[array_rand ($f_contents)];
print $line;
?>
<?php
$rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
$color = '#'.$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)];
?>Then echo out the $color value anywhere you need it. For example:
<body style="background: <?php echo $color; ?>;"><?php printf( "#%06X\n", mt_rand( 0, 0xFFFFFF )); ?>There is also a JavaScript version.
Could be useful for an address book style navigation.
<?php
foreach (range('a', 'z') as $char) {
print '<a href="#' . $char . '">' . $char . '</a> | ';
}
?>
You have an HTML form with a variety of inputs. The action attribute of the form points to a PHP file that contains the code below.
This code starts by creating an array that holds the name of various inputs being submitted via a POST. getFormData() is then called, where the required fields are passed in. Inside the function an array is created to hold various pieces of data related to the form. $formData['valid'] is a boolean referencing if all data was provided and valid, $formData['fields'] is an array keyed by the name of the input with their respective value from the POST data, $formData['notValidFields'] is an array that will contain the names of any inputs that were not passed or that had non-valid data.
This logic can be easily extended with regular expressions to check for stricter data, such as email addresses and urls.
<?php
$requiredFields = array('field1', 'field2', 'field3', 'field4');
$formData = getFormData($requiredFields);
function getFormData($requiredFields){
$formData = array();
$formData['valid'] = true;
$formData['fields'] = array();
$formData['notValidFields'] = array();
for($a = 0; $a < count($requiredFields); $a++){
$field = $requiredFields[$a];
if(isset($_POST[$field])){
$value = $_POST[$field];
if(empty($value)){
$formData['valid'] = false;
$formData['notValidFields'][] = $field;
}else{
$formData['fields'][$field] = $value;
}
}else{
$formData['valid'] = false;
$formData['notValidFields'][] = $field;
}
}
return $formData;
}