PHP - Storing And Accessing $_get And $_post Properties

hey guys basically i have a form which searches my news


<form action="" method="GET">
<label for="search">Search: </label><input name="search" id="search" type="text" />
<input value="Search" type="submit" />
</form>


and im not sure the best way around this or if im going around this the right way but when i access

http://localhost/news/seach   (search form)

and press submit after entering a query i want the action to be

http://localhost/news/seach/search query value here

i hope ive explained well enough and someone could help me with this...thank you

I recently had a customer say that one of my forms isn't working. For some reason the ID number is getting lost when she submits the form.

The form code looks like:
...
print "<form method='post' name='form' action='update.php'>";
...
print "<input type='hidden' name='id' value=\"$id\" />";
print "<input type='submit' name='submit' value=\"Save Session\" />";
print "</form>";
...

And the PHP code that gets executed looks like:
...
//GET SESSION ID
if(isset($_GET['id'])) {  //ID from HTML link, before updates have been made
    $id = $_GET['id'];
} elseif(isset($_POST['id'])) {  //ID from form, after updates have been made
    $id = $_POST['id'];
} else {
    $id = '';
}

//IF SESSION ID IS VALID
if(preg_match("/^\d+$/", $id)) {
    ...
//ELSE, INVALID ID
} else {
    $msg = "<span class='errorText'>Session ID not found or invalid.</span>";
}
...

For some reason she usually gets the "Session ID not found..." error when submitting the form. Do you see any problems with the above code?


Note that she has been able to sucessfully use the form before (in the same day); we have nearly 1,800 records submitted using these forms; and I am unable to duplicate the issue. So I'm at a loss on what to do next.

Also, she talked with her IT person about the form. The IT person was able to submit data on his computer. So he reset her Internet options which seemed to fix the problem on her end temporarily. Note that she is using IE 7. She also said that she doesn't have access to any other browsers.

I'm tempted to chalk this up as a personal computer issue, but wanted to get your input first.

So maybe this is normal, or maybe there is a "better way."
My website operates on $_POST (sanitized, of course), javascript, and hidden inputs.
Visitor posts inventory to my page. This inventory gets added to a big chart.
Sometimes, midway through the process, that visitor might add inventory via a 'referral link' which does a $_GET request to my page.
"Ker-Plunk"
All the $_POST variables are lost.
There.... that's my rant.

The only simple solution appears to be to always save $_POST data to $_SESSION["post"]  on the off-chance  some visitor some day ever decides to do a $_GET request from a referral link.

3 weeks of my life has been lost to correcting the neverending 'illegal string offset' and 'undefined index' errors etc. by making sure every last variable is declared...
At the very least, I quickly learned early on you don't simply slap $_SESSION["post"] = $_POST at the top of the page.
...and it can't be if(isset($_POST)) { $_SESSION["post"] = $_POST } either! (it has to be if ($_SERVER['REQUEST_METHOD'] === 'POST') {$_SESSION["post"] = $_POST; }

Anyway, blah blah blah, that's my rant.

Is there a better way? Or is this "how everybody does it?" It seems stupid to have to do all of this.

 

I am having problems storing a $_POST variable from a form into a $_SESSION.  When I go to the next page and echo out the $_SESSION variable its blank

Page 1 code (page with self submitting form action)


<?php
session_start();

$email = $_POST['email];
$_SESSION['email'] = $email;
?>


Page 2 (page which should be echoing out the value of the session variable)

<?php
session_start();
echo "Your Email Address which you submitted was: " . $_SESSION['email'];
?>


When I echo that out on page 2 its blank

Why is the variable value not carrying over to the 2nd page?

Chad

I have a php search page that takes form data to create its queries, then reload the original search page. The form is long, so there are numerous $_POST's to convert to variables for use in the query. I've looked at "extract" and a few other code snippets. But it's a form and I don't want any security issues. I'm hoping there's a "foreach" solution, but I'm a beginner. What's a proper way to to simplify this:

$s1 = $_POST["s1"];
$s2 = $_POST["s2"];
$s3 = $_POST["s3"];
$s4 = $_POST["s4"];
$s5 = $_POST["s5"];
$s6 = $_POST["s6"];
$s7 = $_POST["s7"];
$s8 = $_POST["s8"];
$s9 = $_POST["s9"];
$s10 = $_POST["s10"];
$s11 = $_POST["s11"];
$s12 = $_POST["s12"];

Hi,

I am a curious fellow just beginning to use PHP. I understand the basics of what the $_GET and $_POST superglobals do, and how we can use them to retrieve data after form submission. I also know that since $_GET and $_POST are just associate arrays, we can create our own values in both $_GET and $_POST by writing statements like $_POST['variable'] = "value".

I am wondering if it is at all possible to send data beyond form data by adding new key/value pairs into $_GET and $_POST. So for example, if I had a form that transferred username/password through Post, would it be possible for me to include further data by just saying $_POST['formtype'] = "house_insurance_form"?

Basically what I'm getting at is trying to physically add your own data to $_POST or $_GET that you could pull from the next page where the form redirects to. In other words, can I send data beyond form data using these superglobals? I know I can do this with $_SESSION, but could I do it through $_POST or $_GET? I haven't been able to accomplish this, and I was just wondering if someone could give me an in-depth explanation of how this might work or how this is not possible. I would really really really appreciate it.

Best Regards,
-Sky

User clicks on a url, ie: example.com/AEQ438J

When I perform this in the code below:

Code: [Select]
    $referrer = $_GET['_url'];
    // echo $referrer displays the referrer ID contents correctly as "AEQ438J"
   
    if ( ! empty($referrer))
    {
    $mysqli->query("UPDATE coming_soon_emails SET clicks = clicks + 1 WHERE code='" . $referrer ."'");
    }
    // this also updates the database correctly as it should

    if (!empty($_POST['email'])){

   // echo $referrer displays the referrer ID contents as BLANK. It should display "AEQ438J"!
    .....
$referrer displays correctly BEFORE if($_POST['form']), however during the if($_POST['form']) $referrer is empty.
How can I fix my code so that $referrer is not empty during the time the user posts their email address in the form?

Thank you!

Complete PHP and HTML

Code: [Select]
    <?php
    
    require "includes/connect.php";
    //var_dump($_GET);die;
    
    function gen_code($codeLen = 7) {     
    $code = '';     
    for ($i=0; $i<$codeLen; $i++) {         
     $d=rand(1,30)%2;       
     $code .= $d ? chr(rand(65,90)) : chr(rand(48,57));      }  
     return $code; 
     }  
    
    
     function add_code($email_id) {
     global $mysqli;
     $code = gen_code(7); 
     $mysqli->query("UPDATE coming_soon_emails SET code='" . $code ."' WHERE email_id='" . $email_id . "'");  
     if($mysqli->affected_rows != 1) {   
     add_code($email_id);  
     } else return $code; } 
    
    $msg = '';
    $referrer = $_GET['_url'];
    // echo $referrer displays the referrer ID contents correctly
    
    if ( ! empty($referrer))
    {
    $mysqli->query("UPDATE coming_soon_emails SET clicks = clicks + 1 WHERE code='" . $referrer ."'");
    }
    
    if (!empty($_POST['email'])){
    
    // echo $referrer displays the referrer ID contents as BLANK
    
        // Requested with AJAX:
        $ajax = ($_SERVER['HTTP_X_REQUESTED_WITH']  == 'XMLHttpRequest');
    
        try{
            if(!filter_input(INPUT_POST,'email',FILTER_VALIDATE_EMAIL)){
                throw new Exception('Invalid Email!');
            }
    
            $mysqli->query("INSERT INTO coming_soon_emails
                            SET email='".$mysqli->real_escape_string($_POST['email'])."'");
    
            if($mysqli->affected_rows != 1){
                throw new Exception('This email already exists in the database.');
            } else {   
              $email_code = add_code($mysqli->insert_id); 
            } 
    
     $msg = "http://www.example.com/" . $email_code;
    
     //the following doesn't work as referrer is now empty :(
     if ( ! empty($referrer))
     {
     $mysqli->query("UPDATE coming_soon_emails SET signup = signup + 1 WHERE code='" . $referrer ."'");
            }
    
     if($ajax){
     die(json_encode(array('msg' => $msg)));
     }
    
        }
        catch (Exception $e){
    
            if($ajax){
                die(json_encode(array('error'=>$e->getMessage())));
            }
    
            $msg = $e->getMessage();        
        }
    }
    
    ?>
   
   
    <!DOCTYPE html>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
   
    <link rel="stylesheet" type="text/css" href="css/styles.css" />
   
    </head>
   
    <body>
   
    <div id="launch">
   
       
        <form id="form" method="post" action="">
        <input type="text" id="email" name="email" value="<?php echo $msg;?>" />
            <input type="submit" value="Submit" id="submitButton" />
        </form>
       
        <div id="invite">
        <p style="margin-top:20px;">The ID of who referred you: <?php echo $referrer; //this displays correctly?>)</p>
        <p style="margin-top:20px;"><span id="code" style="font-weight:bold;">&nbsp;</span></p>
    </div>
   
       
    </div>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
    <script src="js/script.js"></script>
    </body>
    </html>
script.js

Code: [Select]
    $(document).ready(function(){
   
    // Binding event listeners for the form on document ready
   
    $('#email').defaultText('Your Email Address');
   
    // 'working' prevents multiple submissions
    var working = false;
   
    $('#form').submit(function(){
   
    if(working){
    return false;
    }
    working = true;
   
    $.post("./index.php",{email:$('#email').val()},function(r){
   
    if(r.error){
    $('#email').val(r.error);
    } else {
        $('#email').val(r.msg); // not needed but gets hidden anyways...
    $('#launch form').hide();
    $("#code").html(r.msg);
    $("#invite").fadeIn('slow');
    }
   
   
    working = false;
    },'json');
   
    return false;
    });
    });
   
    // A custom jQuery method for placeholder text:
   
    $.fn.defaultText = function(value){
   
    var element = this.eq(0);
    element.data('defaultText',value);
   
    element.focus(function(){
    if(element.val() == value){
    element.val('').removeClass('defaultText');
    }
    }).blur(function(){
    if(element.val() == '' || element.val() == value){
    element.addClass('defaultText').val(value);
    }
    });
   
    return element.blur();
    }
htaccess

Code: [Select]
    RewriteEngine on
   
    RewriteCond %{HTTP_HOST} ^my-url.com
    RewriteRule (.*) http://www.my-url.com/$1 [R=301,L]
   
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^([a-z0-9]+)$ /index.php?_url=$1 [NC,L,QSA]
table.sql

Code: [Select]
    CREATE TABLE IF NOT EXISTS `coming_soon_emails` (   
      `email_id` int(11) NOT NULL auto_increment,   
      `email` varchar(64) collate utf8_unicode_ci NOT NULL,   
      `code` char(7) collate utf8_unicode_ci DEFAULT NULL,
      `clicks` int(64) collate utf8_unicode_ci DEFAULT 0,
      `signup` int(64) collate utf8_unicode_ci DEFAULT 0,
      `ts` timestamp NOT NULL default CURRENT_TIMESTAMP,   
      PRIMARY KEY  (`email_id`),   
      UNIQUE KEY `email` (`email`),
      UNIQUE KEY `code` (`code`)
    ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

Code: [Select]
<?php
   if (isset($_POST['submit']))
   {
      // Grab the selected value
      $optionValue = $_POST['subscriptionLevel'];
      
      // Grab the id of the selected value  ** HOW DO I DO THIS? **
      $optionID = ?????????????????????????;
   }
?>
<html>
   <body>
      <form name="form" method="post" action="">
         <table>
            <tr>
               <td>
                  <label for="subscriptionLevel"></label>
                  <select name="subscriptionLevel" id="subscriptionLevel">
                     <?php do { ?>
                        <option id="<?php echo $dbRowResult['sub_level']; ?>" value="<?php echo $dbRowResult['sub_price']; ?>"><?php echo $dbRowResult['sub_desc']; ?></option>
                     <?php } while ($dbRowResult = $db->dbGetRow($dbQueryResult)); ?>
                  </select>
               </td>
               <td>
                  <label>
                     <input type="submit" name="submit" id="submit" value="submit">
                  </label>
               </td>
            </tr>
         </table>
      </form>
   </body>
</html>

How do I grab the id of the selected value?

Thank you.

A few months ago, and a good amount of time before that, I had people telling me to use isset() instead of performing to see if the variable is empty, such as: !$_GET['']

I know the differences in the function and what they do, but when could isset() be used in a situation where it's better/more efficient then: !$_GET['']

I do use isset(), though.

I am working on a header for a website and the code below pulls the file location for the image. I am wondering how (if possible) I could apply the repeat-x tag to the image. I know it can be done with html/css but I'm not sure how to go about it in PHP. Thanks in advance.


Code: [Select]
<?php

include 'db.php';

$result=mysql_query("SELECT location FROM header WHERE page='home'");

$row = mysql_fetch_row($result);


    echo "<img src=images/".$row[0] . "> ";
    
?>

__call is used when a method has been called, is there anything similar to __call but for properties?

I wanted to use __get, but that is only for private properties...

I'm doing some basic object coding to get my head around OOP PHP, but I've come across something I can't get to work.

I've got two identical peices of code, MyClass is defined, MyClass2 is then defined as an extension of MyClass.  MyClass has three properties Public, Private and Protected.

In my first example I can access Public and Protected via a method in MyClass2, this class does NOT have a constructor.  The second example has a constructor but I cannot access Public:

Code: [Select]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<body>
<?php
ECHO "MyClass2 does not have a constructor, Public & Protected both echo correctly from MyClass2->printHello!!!<BR>";
/**
 * Define MyClass
 */
class MyClass
{
    public $public;
    protected $protected;
    private $private;
protected $varXXX;

function __construct() {
$this->public = "Public";
        $this->protected = "Protected";
        $this->private = "Private";
//$this->printHello();
}


    function printHello()
    {
echo $this->public . "!!!<BR>";
        echo $this->protected . "!!!<BR>";
        echo $this->private . "!!!<BR>";
    }
}




/**
 * Define MyClass2
 */
class MyClass2 extends MyClass
{
    // We can redeclare the public and protected method, but not private
    protected $protected = 'Protected2';
/*
function __construct() {
        echo $this->public . "#<BR>";
        echo $this->protected . "#<BR><BR>";
        //echo $this->private . "???<BR>";
}
*/
    function printHello()
    {
        echo $this->public . "???<BR>";
        echo $this->protected . "???<BR><BR>";
        //echo $this->private . "???<BR>";
    }
}

$obj = new MyClass();
//echo $obj->public . "<BR>"; // Works
//echo $obj->protected; // Fatal Error
//echo $obj->private; // Fatal Error
//$obj->printHello(); // Shows Public, Protected and Private

$obj2 = new MyClass2();
//echo $obj2->public; // Works
//echo $obj2->private; // Undefined
//echo $obj2->protected; // Fatal Error
$obj2->printHello(); // Shows Public, Protected2, Undefined
?>
</body>
</html>
RESULTS IN:
Public???
Protected???

Code: [Select]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<body>
<?php
ECHO "MyClass2 DOES have a constructor, Public does not work from MyClass2->printHello!!!<BR>";
/**
 * Define MyClass
 */
class MyClass
{
    public $public;
    protected $protected;
    private $private;
protected $varXXX;

function __construct() {
$this->public = "Public";
        $this->protected = "Protected";
        $this->private = "Private";
//$this->printHello();
}


    function printHello()
    {
echo $this->public . "!!!<BR>";
        echo $this->protected . "!!!<BR>";
        echo $this->private . "!!!<BR>";
    }
}




/**
 * Define MyClass2
 */
class MyClass2 extends MyClass
{
    // We can redeclare the public and protected method, but not private
    protected $protected = 'Protected2';

function __construct() {
        echo $this->public . "#<BR>";
        echo $this->protected . "#<BR><BR>";
        //echo $this->private . "???<BR>";
}

    function printHello()
    {
        echo $this->public . "???<BR>";
        echo $this->protected . "???<BR><BR>";
        //echo $this->private . "???<BR>";
    }
}

$obj = new MyClass();
//echo $obj->public . "<BR>"; // Works
//echo $obj->protected; // Fatal Error
//echo $obj->private; // Fatal Error
//$obj->printHello(); // Shows Public, Protected and Private

$obj2 = new MyClass2();
//echo $obj2->public; // Works
//echo $obj2->private; // Undefined
//echo $obj2->protected; // Fatal Error
$obj2->printHello(); // Shows Public, Protected2, Undefined
?>
</body>
</html>
RESULTS IN:
#  << Missing the property's contents
Protected2#

??? << Missing the property's contents
Protected2???



Any ideas why I cannot access the property's contents in the second example when the only difference is that it has a constructor?

I have a bunch of quasi-static values that must be available to the application.  Most of them are set based on settings in a configuration file.  Others are based on GET, COOKIE, or SESSION values, and utilize the database to get the actual values.  The values will never be written to or modified by the application, only read.   It seems to me that I could create some sort of superclass which includes static methods and properties, and I could access any value by something like superclass::get('some.value');  I could design the class so that the values are queried from the DB or obtained from a parsed file only the first time they are requested, and for future requests, retrieved from a static property.   That being said, I have been told from more than one person that I am just doing it "wrong".   Please let me know what is wrong about it.   Thank you

If $result contains the result of mysql_query, a select count distinct query, how do I access the count?  I've tried $result[0] to no avail and $result only returns the resource #.

Hi guys,

I have xml that looks like:

<item>
<title></title>
<link></link>
<description></description>
<dc:date>2011-02-27T16:42:31-05:00</dc:date>
</item>


I can access title, link, and description just fine.  But how do I access a tag that has a colon?

I tried this:

Code: [Select]
$x = new SimpleXmlElement($content);
$entry = $x->item;

$entry->children('dc', true)->date;

Thanks for looking.

LR