PHP - Global Variables And Function Arguments?

If I want to load some user information from the database into an object/array and share it throughout my application, what's the best approach for this? Here is what I thought of doing:

- I can call a function (e.g user_info() ) that will return the user information whenever I need it , but It'll have to run a DB query each time I call it.

- Load user information once from the DB, assign it into a global array/object, then call that object whenever I need it.

A lot of people recommended against using global variables, but I think performance wise it's better than running a query each time.

Are there any better alternatives than the above approaches?

        $errors=0;

         //NEW USER NAME HAS BEEN SUBMITTED, CHECK IT OUT AND THEN ADD IF OKAY
$newuser=$_REQUEST['newuser'];

function TryAgain(){
global $errors;
$errors++;
echo '<br/><br/>Please try again <a href="index.php?locate=admin&sub=add_admin">here</a>';
echo "<br/>errors=[$errors]";
}



echo "<br/>Trying to add user: $newuser<br/><br/>";
if ($newuser){
}else{
// field was left blank, report this to user and give them option to try again
echo '<br/>Field was left empty, you must pick a username.';TryAgain();
}

if (strlen($newuser)<5){echo 'Username should be at least 5 characters.';TryAgain();}

if (!$errors){echo "continue to SQL [errors=$errors]";}



what is wrong with this code?
For some reason if I increment $errors with $errors++   within the function it doesn't increment outside the function's scope. even though I declare it as a global at the start of the function. I know I'm doing something stupid here but can somebody please tell me what it is?

Thanks

Hi,

In all my classes, I need to declare globals for everything else, from site variables even to objects (other classes). I obviously don't want to as globals are horrible and I need to have functions clean without globals. I have included a list of all the global vars in the construct and it still doesn't work.

Example:
start.php

<?php 

$vars = array(some values);
$some = more;
$variables = foo;

$helper = new Helper();
$home = new Home();


This is a little bit simplistic, but for some reason, the variables just don't want to go in the main class without a global. Functions will not run if they require any of these variables.

I have a odd one here, two classes and one which calls another class.
I want to pass all of the parameters from the array as seperate variables into the next function. Hope my example explains a little better

class master{  public function __call($name, $args)  {    second->$name($args);  }}class second{  public function example($param1, $param2)  {  }}master->example($param1, $param2);()

( i know its not accurate php, but should get the idea of what im trying to do)
I need to do something with the following line
 second->$name($args);
Where param1 and param2 will be seperated out
Is there a php function which you can tell it the class, method name and pass it an array of parameters?

Thanks

This topic has been moved to Third Party PHP Scripts.

http://www.phpfreaks.com/forums/index.php?topic=350034.0

I need someone to explain how to loop through an array ($products) and grab the three values (name, price, & shipping) and have them sent to "all_products" function - see line 13 then 61 thru 64.

I currently have the script partially working by using array_shift which I know is removing the 1st element (name or $product value).
Note: this is the problem (I need $product included in the call to the "all_products" function along with $price & $shipping so that the final output looks as follow:
---------------------------------

Checkout
Below is a summary of the products you wish to purchase, along with totals:

    * Candle Holder: $12.95
    * Coffee Table: $99.5
    * Lamp: $42.99


Total (including tax and shipping): $182.12
------------------------------------------------------

HERE'S THE SCRIPT FOR REVIEW & COMMENT:
===============================
<B>Checkout</B><br>
Below is a summary of the products you wish to purchase, along with totals:
<?php
 
/*
Fix this code by creating a function to determine sub-totals for each product. Then add the sub-totals together to arrive at the grand total.The product name, & price should display for each item.
 
?><ul><?
 
/* "all_products" function was created to query then calculate the sub-totals for each prodcut, then add each sub-total togehter to form grand total - outside the function */


function all_products($prod_array) {
   extract($prod_array);
   
   #tax rate is constant
   $tax = 0.08;
   $total_price = 0;
   $total_tax = 0;
   $total_shipping = 0;
   
   // Calculations per product with returned sum sent outside to $grand_total variable
   $total_price += $price;
   $total_tax += $tax * $price;
   $total_shipping += $shipping * $price;
   $sub_total = ($total_price + $total_tax + $total_shipping);           # This calculates the sub-total (or Grand total) for each product
   echo "<li>".$product.": $".$price."<br />";         # THE PRODUCT NAME & PRICE SHOULD DISPLAY HERE (NAME IS NOT SHOWING WHICH IS PROBLEM)
   # I had echo statement to confirm calculation on product was correct
   # echo "Grand Total is $".$sub_total."<br />";
   return $sub_total;  # This breaks out of the function when Candle Holder IF statement is true; returning value
}

/*
Keep the functions, and add a two-dimensional array that acts as a product database -- it should contain the name, price, and shipping price for every product -- and use list() and each() to traverse the database.
*/
 
// Products array with List / Each configuration to pass arguements into function
$products = array('Candle Holder' => array('price' => '12.95','shipping' => '0.00'),
            'Coffee Table'=>array('price' => '99.50','shipping' => '0.10'),
            'lamp' =>array('price' => '99.50','shipping' => '0.10'));
            
 
while (list($k, $v) = each($products)) {
   $product = $k;                                                                                                                                           
   # This is individual product name extracted from array
   #echo "Here's the price & shipping cost for ".$product.":<br/>";
   while (list($key, $value) = each($v)) {
      if (array_key_exists('price',$v)) {
         $price = $value;
         #echo "The product ".$key." is: $".$value."<br />";
      }
      if (array_key_exists('shipping',$v)) {
         $shipping = $value;
         #echo "The ".$key." cost is: ".$value."<br />";
      }
 
   }
}

# THE BELOW THREEE LINES TRAVERSE THE ARRAY BUT STRIPPING THE 1ST ELEMENT WHICH IS NOT WHAT I WANT; I NEED THE INCLUDED TO DISPLRAY BEFORE PRICES
$sub_total1 = all_products(array_shift($products));
$sub_total2 = all_products(array_shift($products));
$sub_total3 = all_products(array_shift($products));

 
echo "RESULTS OUTSIDE FUNCTION: ".$sub_total1."<br />";
echo "RESULTS OUTSIDE FUNCTION: ".$sub_total2."<br />";
echo "RESULTS OUTSIDE FUNCTION: ".$sub_total3."<br />";
// Add total sum for each product to define grand total for all products including shipping & taxes
 
$grand_total = $sub_total1 + $sub_total2 + $sub_total3;                             
 
?>
</ul>
<hr>
<br>
<?php
# Below is the "GRAND TOTAL" for all three project - displayed outside the function which should be $182.12 USD
?>
<B>Total (including tax and shipping): $<? echo number_format($grand_total, 2); ?></B>

When I put this chunk of code into it's own function:


function fetch_all ($dbc, $query) {

include ('knuffix_list_func.php');

pagination_start ($dbc, $query);

$offset = $pag_array[0];

$rows_per_page = $pag_array[1];

$query = $query . " LIMIT $offset, $rows_per_page";

echo "test query: " . $query;

knuffix_list ($query, $dbc);

pagination_end ($pag_array);
}


And when I echo out the query as you can see in the example, then I notice that the variables $offset and $rows_per_page never get appended.
I set the variable $pag_array to a global inside the function pagination_start(). It usually works when I DON'T wrap a function around this chunk of code, but if I do wrap a function around everything then the global suddenly won't work anymore.

Btw, this also won't work if I wrap a function around the function DECLARATIONS.

Any ideas, how I could make it work?

This topic has been moved to Third Party PHP Scripts.

http://www.phpfreaks.com/forums/index.php?topic=315384.0

The Business Logic is: If product is already purchased, upgrade the product

I have a customer input form to get information, along with some fields which should be auto populated based on what the customer chooses.

Screen Shot:

    https://i.stack.imgur.com/Fkyim.png
Note: Price and Shipping Weight are done with Ajax,

When we come to the shipping cost I am getting it from Magento, using a PHP function.

form :

     https://paste.ofcode.org/335FVUhpBGbazQtrcPLVQUs
PHP :

sp_cost.php

     https://paste.ofcode.org/hvG2sP9TW9CEPgMMuKXNuw
From the above code I am given the predefined value,

$results = getShippingEstimate('14419','1',"IN","642001");

How can i get country and zipcode from the user entry and return the shipping cost?

 

 

Edited April 26, 2019 by aveeva

Hello,

I was trying out some code to check out how some of the php settings work and when i tried allow_call_time_pass_reference to see if it works, it doesn't spew out any warning or error like the comments in the .ini file mention (or in the manual sites). Maybe i'm not using some other setting in order to see this? Here is my EXACT code.


<?php
ini_set('display_errors',1);
error_reporting(-1);


$variable = 'String';

function display($variable) {
return $variable;
}

echo display(&$variable);
?>


Outputs : String. No errors, no warnings.
I'm running PHP Version 5.3.2-1ubuntu4.5

I need $row['con_id'] outside the function so I can put it into a query, but simply putting global in front of it won't work. What would be the right way to do?

This portion of code is INSIDE a function:

//Loop through the array of data

while ($row = mysqli_fetch_array ($data)) 

{

echo "<table padding='0' margin='0' class='knuffixTable'>";

echo "<input type='hidden' name='con_id' value='<?php echo " . $row['con_id'] . "; ?>' />";

echo "<tr><td width='65px' height='64px' class='avatar_bg' rowspan='2' colpan='2'><img src='$avatar_path' alt='avatar' /></td><td class='knuffix_username'><strong>" . $user_name;

echo "</strong><br />" . $row['category'] .  " | " . date('M d, Y', strtotime($row['contributed_date'])) . "</td></tr><tr><td>";

echo "<form action='' method='post'>

<input type='submit' name='plusVote' value='Y' />

<input type='submit' name='minusVote' value='N' />

</form></td><td class='votes'>Y[ - ] | N[ - ]</td></tr>";

echo "<tr><td class='knuffix_name' colspan='3'><strong>" . htmlentities($row['name']) . "</strong><br /></td></tr>";

echo "<tr><td colspan='2' class='knuffix_contribution'><pre>" . $row['contribution'] . "</pre><br /></td></tr>";

echo "</table>";



The PHP documentation does not show any examples how to GLOBALIZE a mysqli function. I'd need a way to use $row['con_id'] outside the function for the voting script I'm writing.

Thanks for the suggestions.

I run these functions to find the key of a given element inside an array.  Like so;

$ban_ip_file = file("ip_file.txt");
foreach($ban_ip_file as $key => $value)
{
$value = trim($value);
if($value == $ip_from_form)// passed to page by a form
$set = $key;
}

How do I make $set available for testing and file writing further down the script?

Tried assigning global $set; just above the $set=$key; ----but it did not work.

This topic has been moved to Third Party PHP Scripts.

http://www.phpfreaks.com/forums/index.php?topic=319071.0

This topic has been moved to PHP Applications.

http://www.phpfreaks.com/forums/index.php?topic=308349.0

My error is 'Warning: implode() [function.implode]: Invalid arguments passed in /home/definiti/public_html/contact.php on line 73'

Im not sure how to fix this error, as I looked online and it says that my implode() has the right layout too it..

Line 73 in my code (I took the HTML code out) is this line;

Code: [Select]
$message = implode("<br>\n", $messages);

My whole code is;

Code: [Select]
<?php
# PHP Copyright 2007, Thomas Boutell and Boutell.Com, Inc.
# Edited by Definition Designs.

$recipient = 'defenitiondesigns@googlemail.com';
$serverName = 'www.definition-designs.co.uk';


if ($_POST['send']) {
sendMail();
} elseif (($_POST['cancel']) || ($_POST['continue'])) {
redirect();
} else {
displayForm(false);
}

function displayForm($messages)
{
global $login;
$escapedEmail = htmlspecialchars($_POST['email']);
$escapedRealName = htmlspecialchars($_POST['realname']);
$escapedSubject = htmlspecialchars($_POST['subject']);
$escapedBody = htmlspecialchars($_POST['body']);
$returnUrl = $_POST['returnurl'];
if (!strlen($returnUrl)) {
$returnUrl = $_SERVER['HTTP_REFERER'];
if (!strlen($returnUrl)) {
$returnUrl = '/';
}
}
$escapedReturnUrl = htmlspecialchars($returnUrl);
?>


<?php
    
if (count($messages) > 0) {
$message = implode("<br>\n", $messages);
echo("<h4>$message</h4>\n");
}
?>

<form method="POST" action="<?php echo $_SERVER['DOCUMENT_URL']?>">
<p>
<b>Your</b> Email Address   
<input
name="email"
size="35"
maxlength="35"
value="<?php echo $escapedEmail?>"/>
</p>
<p>
Your <b>Real</b> Name   
<input
name="realname"
size="35"
maxlength="35"
value="<?php echo $escapedRealName?>"/>

</p>
<p>
Subject Of Your Message   
<input
name="subject"
size="35"
maxlength="35"
value="<?php echo $escapedSubject?>"/>

</p>
<p>
<i>Please enter the text of your message in the field that follows.</i>
</p>
<textarea
name="body"
rows="10"
cols="60"><?php echo $escapedBody?></textarea>
<p>
<input type="submit" name="send" value="Send Your Message"/>
<input type="submit" name="cancel" value="Cancel - Never Mind"/>
</p>
<input
type="hidden"
name="returnurl"
value="<?php echo $escapedReturnUrl?>"/>
</form>

<?php
}

function redirect()
{
global $serverName;
$returnUrl = $_POST['returnurl'];
$prefix = "http://$serverName/";
if (!beginsWith($returnUrl, $prefix)) {
$returnUrl = "http://$serverName/"; 
}
header("Location: $returnUrl");
}

function beginsWith($s, $prefix)
{
return (substr($s, 0, strlen($prefix)) === $prefix);
}

function sendMail()
{
global $recipient;

$messages = array();

$email = $_POST['email'];
if (!preg_match("/^[\w\+\-\.\~]+\@[\-\w\.\!]+$/", $email)) {
$messages[] = "That is not a valid email address. In format: You@something.com";
}
$realName = $_POST['realname'];
if (!preg_match("/^[\w\ \+\-\'\"]+$/", $realName)) {
$messages[] = "The real name field must contain only alphanumeric characters, spaces and + or - signs.";
}
$subject = $_POST['subject'];
if (preg_match('/^\s*$/', $subject)) {
$messages[] = "Please specify a subject for your message.


";
}
$body = $_POST['body'];
        if (preg_match('/^\s*$/', $body)) {
$messages[] = "Your message was blank. Fill out a message or Click Cancel to cancel message.";
}
   if (count($messages)) {
displayForm($messages);
return;
}

mail($recipient, 
 $subject, 
 $body) or die("unable to send the mail!");
 
$escapedReturnUrl = htmlspecialchars($_POST['returnurl']);
?>

<form method="POST" action="<?php echo $_SERVER['DOCUMENT_URL']?>">
<input type="submit" name="continue" value="Click Here To Continue"/>
<input
type="hidden"
name="returnurl"
value="<?php echo $escapedReturnUrl?>"/>
</form>

<?php
}
?>