PHP - Passing Values Out Of A Function By Reference???

Hi,

I'm just trying out some basic code and playing around with passing variables by reference and i was reading this on the php manual at this page http://php.net/manual/en/language.references.pass.php :


No other expressions should be passed by reference, as the result is undefined. For example, the following examples of passing by reference are invalid:

<?php
function foo(&$var)
{
    $var++;
}
function bar() // Note the missing &
{
    $a = 5;
    return $a;
}
foo(bar()); // Produces fatal error since PHP 5.0.5

foo($a = 5); // Expression, not variable
foo(5); // Produces fatal error
?>


So, i decided to try it out myself like i always do, and i noticed that i'm not getting an error when i do foo(bar()); i.e calling bar() without the & in the function declaration. Infact it works perfectly fine and returns an incremented $a after its passed to foo(). Likewise foo($a = 5); also works great and returns an incremented $a after being passed to foo(). Is this  a mistake in the manual or am i missing something?

Running PHP 5.3.2-1ubuntu4.5

I everyone, I'm developing a small MVC framework for my personal work, now, in order to have access from all the classes to certain variables I've created a registry class, for this to work I have 2 options:
1.- passing every time the registry object to the constructor class(controllers, models, etc)
or
2.- create in the registry static set and get so I can reach the variables by Registry::set(name, value) and Registry::get(name)

My question is, which one of this two options takes less resources(is faster)?

I hope anyone can help me with this, thanks in advance

Hello, I've been stuck on this code for nearly 3 days and i still am not able to understand this too well.

The PHP manual says "Unless the array is referenced, foreach operates on a copy of the specified array and not the array itself. foreach has some side effects on the array pointer. Don't rely on the array pointer during or after the foreach without resetting it."

Right , so from what i understand from that,if i want to modify an array inside a foreach , i need to reference the array.

This example was given in the PHP manual to demonstrate this reference requirement


<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
    $value = $value * 2;
}
// $arr is now array(2, 4, 6, 8)
unset($value); // break the reference with the last element
?>


But, when i try this code :

<?php
$array = array('Ibanez');
foreach ($array as $guitar) {
$array['guitar'] = $array[0];
unset($array[0]);

$array['guitar'] = 'Gibson';
}
print_r($array);
?>


The output of the array outside the foreach shows the changed array and not the original anymore. So doesn't this mean that the foreach CAN indeed operate on the array itself without the array being referenced? The reason i'm stuck with this code is that i'm trying to use another slightly bigger array which needs to have its keys modified within the foreach statement, but the changes refuse to leave the foreach loop. But when i tested this small piece of code above, changes are indeed getting reflected without any reference. I'm really confused now about how this works. Help is greatly appreciated

OK, so I have the following file that has database functions:

<?php

function dbDelete($param){
$conDelete = mysql_connect($url,'username','password',true);
mysql_select_db('my_db',$conDelete);
mysql_query($param,$conDelete);
mysql_close();
   if(isset($conDelete)){
   mysql_close($conDelete);
   }
}
?>

I include the above file in a session handling file.  But for some reason the new file can't call the above function as follows:
<?php
include_once 'the above stated file';
function timeOut(){
        dbDelete("DELETE FROM acctussessi WHERE acctussessi_usid = '$sessius[0]'");
   $_SESSION = array();
   setcookie(session_name(),'',time()-4200);
   session_destroy();
}
//CHECK FOR TIMEOUT REQUEST
switch($_GET['xyz']){
   case 'timeout':
   timeOut();
   header("Location: /?xyz=timedout");
   break;
   case 'logout':
   timeOut();
   header("Location: /?xyz=loggedout");   
   break;
   case 'refresh':
   dbUpdate("UPDATE acctussessi SET acctussessi_time = ".time()." WHERE acctussessi_unid ='".$token."'");   
   break;
}
?>

dbDelete isn't being called inside of the TimeOut() function.  The only way it works is by doing the following:

<?php
function timeOut(){
   $_SESSION = array();
   setcookie(session_name(),'',time()-4200);
   session_destroy();
}
//CHECK FOR TIMEOUT REQUEST
switch($_GET['xyz']){
   case 'timeout':
      dbDelete("DELETE FROM acctussessi WHERE acctussessi_usid = '$sessius[0]'");
   timeOut();
   header("Location: /?xyz=timedout");
   break;
   case 'logout':
      dbDelete("DELETE FROM acctussessi WHERE acctussessi_usid = '$sessius[0]'");
   timeOut();
   header("Location: /?xyz=loggedout");   
   break;
   case 'refresh':
      dbUpdate("UPDATE acctussessi SET acctussessi_time = ".time()." WHERE acctussessi_unid ='".$token."'");   
   break;
}
?>
But this is annoying and repetitive.  What is going on?

Thanks in advance.

hello

how do i pass a foreach loop through "Passing by Reference"

say i have a foreach loop in a function like this:

Code: [Select]

function findText(&$output){
  $word = Text::find_all(); 
  foreach ($word as $words){
  $output = $words->text;
  }
}

then one the page i put

Code: [Select]

findText($output);
echo $output;


that will just give me the last word in the database.

so how do i get it to echo out the array on the page ?

thanks

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

hey guys
i am  stuck at one part. i am coding a site where on the index page there are 5 categories. Now on click of these it takes me to a page where i can search within a particular category. i can do it by statically giving <href="localhost/xampp/abc.php">and a fixed page path. but i want the name of the category passed when i click and the search page to open when i open search.


thanks

Hi guys   I would like to get whole content of html file after I submitted a password. The problem is that the my code doesn't access the value for the file. I tried to create a session but i doesn't work. What other option do I have to get the content of the html file?

session_start();
  	$selected_file = $_POST['radio1'];
  	// get the filename of the file
    $fileinfo = pathinfo($selected_file);
    $filename = $fileinfo['dirname'] . DIRECTORY_SEPARATOR . $fileinfo['filename'];
    $password = 'code';
    $lines = file("$filename.html");
    $_SESSION['selectedfile'] = $selected_file;
    $_SESSION['file'] =  $filename;
    $_SESSION['Scipt'] =  ("$filename.html");
    $_SESSION['Scipttext'] =  $lines;
  	$_SESSION['file2'] = $fileinfo;
	

if (isset($_POST['submitradio']))
{ 
 	 echo '<div class="imageselected">';
	 echo '<img src="'.$_SESSION['selectedfile'].'" /></br>'.PHP_EOL;
	 echo '</div>';
    // check to see if a html file named the same also exists
    if(file_exists($_SESSION['Scipt']))
    {
    	
    	echo "<form action='test_result.php' method='post'>";
    	echo '<div class="Password">';
    	echo 'Type in password to view full Script';
    	
		echo "<label><div class=\"Input\"><input type='password' name='passIT' value='passit'/></div>";
		echo "<input type='submit' name='submitPasswordIT' value='Submit Password'/></div>";
		echo '</div>';
		echo "$filename.html shares the same name as $selected_file";
		

		for($x = 1;$x<=15;$x++) {
		header( "Content-Type: file/html" );
		$lines = ($_SESSION['Scipttext']);
		$new = strip_tags($lines); 
		echo $lines[rand(0, count($lines)-1)]."<br>";
        }
    	// end of forloop
 
		}
  		// end of check
		  // start Sorrytext
		 
    		else
    		{
    		 echo '<div class="NoScript">';
        		echo "Nothing available at the moment.";
        		echo '</div>';
    		}
    		
		 // end Sorrytext
}
// End of submitradio
if($_POST['submitPasswordIT']){
if ($_POST['passIT']== $password ){
echo "You entered correct password";
readfile($_SESSION['Scipt']);
}
else{
echo "You entered wrong password";
}
}
echo '</form>';

I would be grateful for help.

Hi,

I have looked through the forum for a fix for this but I was unable to find one.

Basically the code I have provided below is not giving me the correct output in other words changing the text to German.

I am using an "Ubuntu" environment with Apache2 and php5 installed.  I have checked that php-gettext is installed.

I have also attached my .mo file  (I have added the .txt extension to upload here)

local.php
<?php

$locale = false;
if (isSet($_GET["locale"])){
$locale = $_GET["locale"];
setcookie("locale", $locale, time()+60*60*24*30, "/");// save a cookie
}
if (!$locale && isSet($_COOKIE["locale"])){
$locale = $_COOKIE["locale"];
}
putenv("LC_ALL=$locale");//needed on some systems
putenv("LANGUAGE=$locale");//needed on some systems
setlocale(LC_ALL, $locale);
bindtextdomain("messages", $_SERVER["DOCUMENT_ROOT"]."locale");
bind_textdomain_codeset("messages", "UTF-8");
textdomain("messages");

?>


test.php
<?php require_once "local.php";

echo $_SERVER["DOCUMENT_ROOT"]."locale";  //for testing
?>
<html><head></head>
<body>
<a href='?locale=en_US'>English</a> |
<a href='?locale=es_ES'>Spanish</a> |
<a href='?locale=de_DE'>German</a>
<br>
<?php echo _("Hello World!");?><br>
<p><?php echo _("My name is");?> Bob.</p>
</body>
</html>

Is it correct that in order to pass values from web page to web page that you either have to...

1.) Use a Cookie
2.) Use a Session
3.) Write/Read to a Database Record


Debbie

Hi
        I have a problem i need some help with, when passing values from my Results page to my Details page through a URL is the Querystring different because i have INNER JOINED 2 tables? This is my Querystring

<a href="DetailsPet.php?id=<?php echo $row_ResultsRS['id']; ?>">Details</a></td>

i have 2 tables (petdata and customerdata) and there INNER JOINED using the 'id'

But its not passing on the values, and just shows the 1st results in database all the time. Im only just learning Php, but would i be right in thinking it to do with the 'id' as this is what joins the 2 tables. Do i have to state which 'id' to use? if so how do i do it?

Thanks willo

hi guys
im back for more php questions
hope you dont get annoyed

<?php
function getvalue($num)
{
echo "<input type='text' name='txt1' value='$num'>";
}
?>
<html>
<head>
<title>Home</title>
</head>
<body>
<form action="" method="POST">
<input type="text" name="txt1" id="txt1" value="0">
<input type="button" name="btn1" id="btn1"  value="1" onclick="getvalue(1);">
<input type="button" name="btn2" id="btn2"  value="2" onclick="getvalue(2);">
</form>
</body>
</html>

here is my code
my question is
how can i pass the values at the php function? how can i display the passed value to the textbox txt1? is this code correct? echo "<input type='text' name='txt1' value='$num'>";

On one of my calculators : https://bizztools.net/2017/qccu/bizztools2015_budgetTest.php

When you press on the envelope in the middle you can send a form to yourself.
Currently it sends all the subtotals for each section .. Income, Personal, Debts etc and I wanted it to now  send  each individual value.

I've added the code in the file that gets used to send the form to the person's email.

Header section:

for ($i = 0; $i <= 79; $i++) {
$item_Annual[$i]  = number_format($_REQUEST['itemAnnualDisplay[$i]']); 
}

Body:     (each line of the form has a different value for $item_Annual)  from 1 to 79

		<TD bgcolor="#EEEEEE" align="left"  valign="middle" height="1"><Font style="font-family:Arial; font-size: 12px;"><font color="#000000">&nbsp;&nbsp;'.$currencySymbol.$item_Annual[1].' &nbsp;</TD>

I've also  added the return code in the  calculations php file.
This section of code is just for the Income sub section

for ($i = 0; $i <= 6; $i++) {
    $incomeSubtotal += $values[$i] * $periods[$i];
    $itemAnnual[$i] = $values[$i] * $periods[$i]; 
    $return['itemAnnualDisplay[$i]'] = $itemAnnual[$i]; 
}
                    
                    //New addtions are lines 3 and 4, the others were already there

 

Now, I've done some process of elimination and when testing to see if   $periods[$i] and values[$i] would show up on the form, the values were zero for each. So each $itemAnnual[$i]is calculated to be $0.

You can see from the form screenshot, the subtotals are calculating, but the individual items are not.

Could this have anything to do with the  form on the calculator page? It's in bootstrap.

 

Help please!! 

 

 

 

 

i am writing this script for use as an include in joomla and the directphp plugin so in my joomla article i have:
Code: [Select]
<?php
include 'test/conducttest.php';
conducttest();
?>
Ok now my issue!
the form in this function is passing only the values for the last item in the loop rather than for the selected radio item when submitted.
so when say for example the radio selected is:
ID TEST TYPE UNIQUE TEST ID AVAILABLE 5    Adolescent Clinical 50021629 1
and the last item in the list is:
ID TEST TYPE UNIQUE TEST ID AVAILABLE 4 Adult Clinical 12341629 1
When the form is submitted even if the 1st item is selected, it returns the value for the second one. I am sorta new to php so any suggestions will be appreciated.
Here is my full code:
Code: [Select]
<?php
function conducttest() {
    //GET JOOMLA USER ID & USERNAME FOR LOGGED USER
    $user =& JFactory::getUser();
    $userID = $user->id;
    
    //GET JOOMLA DATABASE OBJECTS
    $db =& JFactory::getDBO();
    
    //NEW TESTS QUERY (what purchased test are available for use with 'item_available' == '1' {unused test} and matching current 'user_id')
    $new_query =    "
                SELECT *
                FROM crt_transactionHistory
                WHERE user_id = ".$userID." AND item_available = '1'
                ORDER BY item_name, id
                ";
    $db->setQuery($new_query);
    $new = $db->loadAssocList();
    
    //OPEN TESTS QUERY (what purchased test are available for use with 'item_available' == '2' {resume test} and matching current 'user_id')
    $resume_query =    "
                SELECT *
                FROM crt_transactionHistory
                WHERE user_id = ".$userID." AND item_available = '2'
                ORDER BY item_name, id
                ";
    $db->setQuery($resume_query);
    $resume = $db->loadAssocList();
    
        //DISPLAY use_test FORM
        if(!isset($_POST['test'])) {
            //SELECT FORM: WHICH TEST WOULD YOU LIKE TO USE?
            echo '
                <fieldset>
                <table>
                <form method="post" action="'.$PHP_SELF.'">';
                if (empty($new)) {
                    echo '
                    <th colspan="3"align="left">NO NEW TESTS AVAILABLE</th>';
                }
                else {     
                    echo '
                    <th colspan="3"align="left">NEW TESTS AVAILABLE</th>
                    <tr>
                        <td width="75px">SELECT</td>
                        <td width="50px">ID</td>
                        <td width="150px">TEST TYPE</td>
                        <td width="150px">UNIQUE TEST ID</td>
                    <tr>';
                    foreach ($new as $result1) {
                    echo ' 
                    <tr>
                        <td><input type="radio" value="' .$result1['id']. '" name="test_id"></td>
                        <td>'.$result1['id'].'</td>
                        <td><input type="hidden" value="'.$result1['item_name'].'" name="item_name">'.$result1['item_name'].'</td>
                        <td><input type="hidden" value="'.$result1['item_number'].'" name="item_number">'.$result1['item_number'].'</td>
                        <input type="hidden" value="'.$result1['item_available'].'" name="item_available">
                        <input type="hidden" value="'.$userID.'" name="userID">
                    <tr>';   
                    }
                }
                echo '
                </table>
                <hr />
                <table>';
                if (empty($resume)) {
                    echo '
                    <th colspan="3"align="left">NO TESTS TO RESUME</th>';
                }
                else {     
                    echo '
                    <th colspan="3"align="left">RESUME TEST</th>
                    <tr>
                        <td width="75px">SELECT</td>
                        <td width="50px">ID</td>
                        <td width="150px">TEST TYPE</td>
                        <td width="150px">UNIQUE TEST ID</td>
                    <tr>';
                    foreach ($resume as $result2) {
                    echo ' 
                    <tr>
                        <td><input type="radio" value="' .$result2['id']. '" name="test_id"></td>
                        <td>'.$result2['id'].'</td>
                        <td><input type="hidden" value="'.$result2['item_name'].'" name="item_name">'.$result2['item_name'].'</td>
                        <td><input type="hidden" value="'.$result2['item_number'].'" name="item_number">'.$result2['item_number'].'</td>
                        <input type="hidden" value="'.$result2['item_available'].'" name="item_available">
                        <input type="hidden" value="'.$userID.'" name="userID">
                    <tr>';   
                    }
                }
                echo '
                </table>
                </fieldset>
                <input type="submit" name="test" value="Conduct Test" />
                </form>
                ';                
            }
        //NOW A TEST HAS BEEN SELECTED FOR USE
        if(isset($_POST['test'])) {
            $test_id = $_POST['test_id'];
            $item_name = $_POST['item_name'];
            $item_number = $_POST['item_number'];
            $item_available = $_POST['item_available'];
            $userID = $_POST['userID'];
            echo $test_id.'<br />';
            echo $item_name.'<br />';
            echo $item_number.'<br />';
            echo $item_available.'<br />';
            echo $userID.'<br />';
            //IF THIS IS A NEW TEST...
            if ($item_available == "1") {
                echo 'new test';
            }
            //IF WE ARE RESUMING A TEST...
            elseif ($item_available == "2") {
                echo 'resume test';
            }
        }
}
?>

I have managed to create an update script that allows a user to submit changes to their details but I need help to finish of the code. I'm using sessions to login in members, here is my update.php code.

After while($member = mysql_fetch_array($result)) {   I would like to retrieve the new values entered by them to be displayed back to the previous form which uses $_SESSION to hold their information when they previously login.

Any suggestions or ideas, as I think it's to do with clearing the session but unfamiliar on how to proceed.



<?php 

include("config.php");

mysql_connect("$dbhost","$dbuser","$dbpass") or die(mysql_error()); 
mysql_select_db("$dbname") or die(mysql_error()); 

$id= mysql_real_escape_string($_POST['member_id']); 
$fname= mysql_real_escape_string($_POST['firstname']); 
$lname= mysql_real_escape_string($_POST['lastname']); 
$address= mysql_real_escape_string($_POST['address']);
$town= mysql_real_escape_string($_POST['address2']); 
$county= mysql_real_escape_string($_POST['county']);
$postcode= mysql_real_escape_string($_POST['postcode']);
$telephone= mysql_real_escape_string($_POST['telephone']);
$mobile= mysql_real_escape_string($_POST['mobile']); 
$username= mysql_real_escape_string($_POST['login']); 
$email=mysql_real_escape_string($_POST['email']); 

$id= $_POST['member_id']; 

$sql="UPDATE members SET firstname='$fname', lastname='$lname', address='$address', address2='$town', county='$county', postcode='$postcode', telephone='$telephone', mobile='$mobile', login='$username', email='$email' WHERE member_id='$id' LIMIT 1";

$result=mysql_query($sql) or die ("Error: ". mysql_error(). " with query ". $sql); 

$query = "SELECT * FROM members WHERE member_id = '$id'";
$result = mysql_query($query) or die(mysql_error());

while($member = mysql_fetch_array($result)) {


}
?>