Tutorial Send a Text Message

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You'll need a TextMagic account and to download their PHP helper which they provide after signing up.

// Include the TextMagic PHP lib
require('textmagic-sms-api-php/TextMagicAPI.php');

// Set the username and password information
$username = 'myusername';
$password = 'mypassword';

// Create a new instance of TM
$router = new TextMagicAPI(array(
	'username' => $username,
	'password' => $password
));

// Send a text message to '999-123-4567'
$result = $router->send('Wake up!', array(9991234567), true);

// result:  Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 )

Reference URL

Tutorial Sanitize Database Inputs

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1) Function for stripping out malicious bits

<?php
function cleanInput($input) {
 
  $search = array(
    '@<script[^>]*?>.*?</script>@si',   // Strip out javascript
    '@<[\/\!]*?[^<>]*?>@si',            // Strip out HTML tags
    '@<style[^>]*?>.*?</style>@siU',    // Strip style tags properly
    '@<![\s\S]*?--[ \t\n\r]*>@'         // Strip multi-line comments
  );
 
    $output = preg_replace($search, '', $input);
    return $output;
  }
?>

2) Sanitization function

Uses the function above, as well as adds slashes as to not screw up database functions.

<?php
function sanitize($input) {
    if (is_array($input)) {
        foreach($input as $var=>$val) {
            $output[$var] = sanitize($val);
        }
    }
    else {
        if (get_magic_quotes_gpc()) {
            $input = stripslashes($input);
        }
        $input  = cleanInput($input);
        $output = mysql_real_escape_string($input);
    }
    return $output;
}
?>

Usage

<?php
  $bad_string = "Hi! <script src='http://www.evilsite.com/bad_script.js'></script> It's a good day!";
  $good_string = sanitize($bad_string);
  // $good_string returns "Hi! It\'s a good day!"

  // Also use for getting POST/GET variables
  $_POST = sanitize($_POST);
  $_GET  = sanitize($_GET);
?>

Reference URL

Tutorial Return Only One Variable from MySQL Query

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Function

function mysql_get_var($query,$y=0){
       $res = mysql_query($query);
       $row = mysql_fetch_array($res);
       mysql_free_result($res);
       $rec = $row[$y];
       return $rec;
}

Usage

$name = mysql_get_var("SELECT name from people where email = 'roger@freekrai.net'");

Will return the name field, so what gets returned will be "Roger" (if that was my name in the database).

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Tutorial Read/Write Files

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Append to a file

function fileWrite($file, $message) {
  fwrite(fopen($file, 'a'), $message . "\n");
}

Read and display entire file

function fileRead($file){
   $lines = file($file);
   foreach ($lines as $line_num => $line) {
      echo  $line,  '</br>';
   }
}

Tutorial Randomize File Name

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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;
}

Tutorial Randomize Background Image

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1. Above the DOCTYPE

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
?>

1. CSS in the <head>

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>

Tutorial Random String from Pre-Determined Characters

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<?php
$string = "abcdwxyz456789";
for($i=0;$i<25;$i++){
   $pos = rand(0,13);
   $str .= $string{$pos};
}
echo $str;
?>