PHP - Why Are The () And Print Operators Misssing From Precedence Manual?

Hello all,

My knowledge in PHP is growing everyday as I try out more stuff but I really didn't understand this bit :
"Note: Please note that the ternary operator is a statement, and that it doesn't evaluate to a variable, but to the result of a statement. This is important to know if you want to return a variable by reference. The statement return $var == 42 ? $a : $b; in a return-by-reference function will therefore not work and a warning is issued in later PHP versions. ".

taken from the page : http://www.php.net/manual/en/language.operators.comparison.php

From what I understood, if I was to use a ternery condition in the return statement, and return a referenced variable as a result, it
shouldn't work?

So this shouldn't work?

$int = 10;

function testReturn(&$referencedVariable) {
return (1==1) ? $referencedVariable : FALSE;
}

echo testReturn($int);


But it does. Anyways i'm pretty sure I didn't understand this right, so help with this is really appreciated

Hi,
I'm trying to login oscommerce with manual code. but unable to do that. all entries going to database but don't understand what is missing???
here is my code

Code: [Select]
$email_address = $_REQUEST['txtemail'];
       $password = $_REQUEST['password'];

    $check_customer_query = mysql_query("select customers_id, customers_firstname, customers_password, customers_email_address, customers_default_address_id from customers where customers_email_address = '" . $email_address . "'");
    if (mysql_num_rows($check_customer_query)> 0)
{
   $check_customer = mysql_fetch_assoc($check_customer_query);
  if (!tep_validate_password($password, $check_customer['customers_password']))
   {
     echo "password not found.";
   }else {

 

  tep_session_recreate();


$check_country_query = mysql_query("select entry_country_id, entry_zone_id from address_book where customers_id = '" . (int)$check_customer['customers_id'] . "' and address_book_id = '" . (int)$check_customer['customers_default_address_id'] . "'");
$check_country = mysql_fetch_array($check_country_query);

$customer_id = $check_customer['customers_id'];
$customer_default_address_id = $check_customer['customers_default_address_id'];
$customer_first_name = $check_customer['customers_firstname'];
$customer_country_id = $check_country['entry_country_id'];
$customer_zone_id = $check_country['entry_zone_id'];
tep_session_register('customer_id');
tep_session_register('customer_default_address_id');
tep_session_register('customer_first_name');
tep_session_register('customer_country_id');
tep_session_register('customer_zone_id');

mysql_query("update customers_info set customers_info_date_of_last_logon = now(), customers_info_number_of_logons = customers_info_number_of_logons+1 where customers_info_id = '" . (int)$customer_id . "'");


anyone have any idea about?

Hi guys!

I am trying to understand why the final value of $m equals 40 in the following code

Code: [Select]
<?php
$i = 29;
$j = 11;
$m = 10;

$j = ($j - 4) / 2;
$m += $j * 10;
echo "m = ".$m."<br>"; //Equals 40
?>

Can anyone explain me please? I feel very confused right now. 

I came across these pieces of code and have been trying to understand  this operator  ->
Or if it is a operator. I have searched and couldn't find explanations. In trying to learn I need to know what is is used for. Is it used only with classes?

$m->myMethod();

return  $this->x;

Hello forum.
I'm new here, but I've been reading and finding useful things for a while now.

I'm still new to PHP and I need a little help.

I'm doing a school project and I have some things I want to do, but do not know how to write it down in PHP.

I think I'll ask a lot of questions this week, and I hope I will get some help..

For start I want to ask this:

I've been using Code: [Select]
mysql_fetch_array() for doing loops and populating check-boxes. And everything's working fine.. but what I want is to control the actual loop by clicking buttons. Let's say first time a while-do is run, my check-boxes get populated from the database and every other loop the next data from the table is added.. pretty straightforward.
I want to be able to populate once, then click "next" and the new data to be added and so on..
Code: [Select]
<?php
$tema = mysql_query("SELECT * from questions")or die(mysql_error());

function answer1($string)
{
$string1 = explode("/", $string);
echo $string1[0];
}
function answer2($string)
{
$string1 = explode("/", $string);
echo $string1[1];
}

while ($row=mysql_fetch_array($tema))
{
echo mysql_fetch_array($tema);
$tip=$row["tip"];
if ($tip==2)
{
$id=$row['prasanje_id'];
$question=$row['question'];
$answer=$row['answer'];
?>
   <label> <?php echo $question?></label><br>
   <input type="checkbox"  name="CheckboxGroup1" value="checkbox" id="CheckboxGroup1_0" />
      <?php answer1($tekst) ?></label>
    <label>
      <input type="checkbox"  name="CheckboxGroup1" value="checkbox" id="CheckboxGroup1_1" />
      <?php answer2($tekst) ?></label>
<?php
}
}
?>I want an alternative to the while-do loop..
Is it possible to do this?

Thanks!!

Hello I have the following error:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM players WHERE ((NOT inactive_player) AND ((players.Player_Last_Name = 'p' at line 3

I think my error is in the statement below...


    Code: [Select]
echo "1";
$getNewPlayers =
"SELECT players.Player_number,
players.Player_name,
FROM players
WHERE ((NOT inactive_player)
AND ((players.Player_Last_Name = 'player_find%')))
ORDER BY player_name";
$rsNewPlayers = mysql_query($getNewPlayers, $link) or die (mysql_error());
$varNewCount = mysql_num_rows($rsNewPlayers);
echo $varNewCount['Player_name'];


Can you tell me where the error is and how I might go about to fix it?

Thanks,

Hello,
I have a wordpress site using Thesis 2.1 theme and I am displaying "excerpts" for each post on homepage.. I don't want to add <!-- more --> to each post and I want to show sth different, sth more valuable on the homepage to my readers.. Thats why I use excerpts.

I added this line of code to my custom.php file:

function new_excerpt_more($more) {
global $post;
return ' <a href="'. get_permalink($post->ID) . '">Continue Reading...</a>';
}
add_filter('excerpt_more', 'new_excerpt_more');

It added a "continue reading.." link to the posts that I haven't yet defined excerpt.. So, If nothing is written on the excerpt area of that post, it shows some part of the post and adds a "continue reading.." link to it on the homepage. But if I have written sth in the excerpt area of the post, it does shows the excerpt, but doesn't add the "continue reading.." link at the end..
I will be happy if you may help me on this, this drives me nuts currently! [/size]

MERGED

So basically, what I am trying to do is, adding read more tag to custom excerpts which we define manually.
Here is another code I tried but had no luck again!

//* Changing excerpt more - only works where excerpt IS hand-crafted
function manual_excerpt_more( $excerpt ) {
	$excerpt_more = '';
	if( has_excerpt() ) {
    	$excerpt_more = '&nbsp;<a href="' . get_permalink() . '" rel="nofollow">[Read more]</a>';
	}
	return $excerpt . $excerpt_more;
}
add_filter( 'get_the_excerpt', 'manual_excerpt_more' );

Edited by Ch0cu3r, 09 November 2014 - 01:18 PM.

i'm trying to develop a deeper understanding of sessions, and I found this article on php.net regarding sessions with the following script;

<?php
    // Get the private context
    session_name('Private');
    session_start();
    $private_id = session_id();
    $b = $_SESSION['pr_key'];
    session_write_close();
   
    // Get the global context
    session_name('Global');
    session_id('TEST');
    session_start();
   
    $a = $_SESSION['key'];
    session_write_close();

    // Work & modify the global & private context (be ware of changing the global context!) 
?> 
<html>
    <body>
        <h1>Test 2: Global Count is: <?=++$a?></h1>
        <h1>Test 2: Your Count is: <?=++$b?></h1>
        <h1>Private ID is <?=$private_id?></h1>
        <h1>Gloabl ID is <?=session_id()?></h1>
        <pre>
        <?php print_r($_SESSION); ?> 
        </pre>
    </body>
</html>
<?php
    // Store it back
    session_name('Private');
    session_id($private_id);
    session_start();
    $_SESSION['pr_key'] = $b;
    session_write_close();

    session_name('Global');
    session_id('TEST');
    session_start();
    $_SESSION['key']=$a;
    session_write_close(); 
?> 

[EDIT BY danbrown AT php DOT net: Contains a bugfix provided by (lveillette AT silexmultimedia DOT com) on 19-NOV-09.]

I do not understand line 21 and 22.

<h1>Test 2: Global Count is:<?=++$a?></h1>

If I change this to;

        <h1>Test 2: Global Count is:<?php echo =++$a; ?></h1>
or
        <h1>Test 2: Global Count is:<?php =++$a ?></h1>

I would get a parse error, unexpected "=" in line 21.

Can anyone explain why this is?

* Why is it being echoed
* Why can I not use echo in this case
* Why does the code not start with <?php ?
* What does line 21 even mean? =++$a?       Thanks in advance guys!
Edited by empec, 13 July 2014 - 11:30 AM.

I'm trying to get an equation from a user that types it in the url, ex) 1+2+3. I can get the 1,2,3 fine, but the + operator is no longer in the string. Same with the * and / operators. Is there a way to keep them as a string using $_GET?

I have a query that is very messy.  I have tried using () to seperate everything and when I do it just all goes wrong.

here is the query



SELECT posts.*, users.*, countries.countryID, countries.country FROM posts 
INNER JOIN users ON users.userID = posts.postUserID INNER JOIN countries ON countries.countryID = users.userCountry WHERE posts.cityID = '".$row_rs_city['cityID']."'  AND posts.type = 'sightseeing' OR posts.cityID = '".$row_rs_city['cityID']."' AND posts.type = 'Inner city sightseeing' OR posts.cityID = '".$row_rs_city['cityID']."' AND posts.type = 'Outer city sightseeing'  ORDER BY posts.postID DESC

 

Is there a way of re-writing this so that it has brackets seperating everything and it will still work.  It works for the minute but re- writing posts.cityID = '".$row_rs_city['cityID']."' inbetween every OR just seems wrong.

Thanks for your help guys

Hi every one,

I just want to know what is the use of '<<' and '>>' operators in php

$pastelink = "<br /><a href='view.php?paste=$lol&language=$language'>$name</a>";
mysql_query("INSERT INTO recent (url) VALUES ('$pastelink')");


That query won't run, however if I do this:


$test = $_POST['name'];
//$pastelink = "<br /><a href='view.php?paste=$lol&language=$language'>$name</a>";
mysql_query("INSERT INTO recent (url) VALUES ('$test')");


It will run, is this because of the single quotes in $pastelink?

& If so, how can I fix it?

Hi, I have been trying to make a page which shows a number of thumbnails, populated by images and text from a database, this I got working perfectly fine, but as I am now trying to make it so users can log in and edit or delete each one, it has all started to go a bit wrong and I was wondering if anyone could spot why?!?

It is currently bringing up this message on the screen:

Error fetching entries from the database, error: Statement: SELECT image,id,projecttitle,projectcode,FROM portfolio ORDER BY id DESC LIMIT 16
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM portfolio ORDER BY id DESC LIMIT 16' at line 1
Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in /Users/mdfcows/Sites/atelier/portfolio.php on line 129

I don't quite know how to get it to print out the full nature of the error, but this is the code I am using:
Code: [Select]
<?php
$max_items2 = 16; /* max number of news items to show */

require_once('config.php');
$db2 = mysql_connect (DB_HOST,DB_USER,DB_PASSWORD);
if(!$db2) {
die('Failed to connect to server: ' . mysql_error());
}
mysql_select_db (DB_DATABASE,$db2);

function displayNews($all2 = 0) {
    global $db2, $max_items2;
    
    if ($all2 == 0) {
        /* query for news up to $max_items */
        $query9 = "SELECT image,id,projecttitle,projectcode," . 
                 
                 "FROM portfolio ORDER BY id DESC LIMIT $max_items2";
    } else {
        /* query for all news */
        $query9 = "SELECT image,id,projecttitle,projectcode," . 
                 
                 "FROM portfolio ORDER BY id DESC";
    }
    $result9 = mysql_query($query9) or print("<p>Error fetching entries from the database, error: " . "Statement: " . $query9 . "</p>" . mysql_error());


    while ($row9 = mysql_fetch_assoc ($result9)) {
        
        $title = htmlentities ($row9['projecttitle']);
        $news = nl2br (strip_tags ($row9['projectcode'], '<a><b><i><u>'));
$image = $row9['image'];
$id = $row9['id'];
        
        /* display the data */
?>
<div class="boxgrid captionfull">
            <a id="<?php echo $id ?>"
           
<a class='visit' href="project.php?id=<?php echo $news ?>">
               
                <?php echo $image;

                if(strstr($image, 'jpg') or (strstr($image, 'png')) or (strstr($image, 'gif')) or (strstr($image, 'bmp')) or (strstr($image, 'jpeg')) ) {
echo "<img class='cpimg' src='images/portfolio/$image' alt='' />";
}else {
echo "";}
?>"></a>
               
               
                <div class="cover boxcaption" style="top: 122px; ">
<p align="left"><?php echo $title ?></p>
</div>
                </div>
        <?php

//Check whether the session variable SESS_MEMBER_ID is present or not

if(isset($_SESSION['SESS_MEMBER_ID']) || (!trim($_SESSION['SESS_MEMBER_ID']) == '')) {
echo "<form class='editbtn' action='editportfolio.php' method='POST'>";
echo "<input type='hidden' name='idf' value='$id' />";
echo "<input src='images/editbtn.png' type='image' value='Edit' />";
echo "</form>";
echo "<form class='editbtn' action='deletportfolio.php' method='POST'>";
echo "<input type='hidden' name='ide' value='$id' />";
echo "<input src='images/delbtn.png' type='image' value='Delete' />";
echo "</form>";
} else {
echo "";
}



    }
    
   
}

/* this is where the script decides what do do */

echo "\n";
switch($_GET['action']) {

    case 'all':
        displayNews(1);
        break;
    default:
        displayNews();
}
echo "\n";
?>

<?php
//Check whether the session variable SESS_MEMBER_ID is present or not
if(isset($_SESSION['SESS_MEMBER_ID']) || (!trim($_SESSION['SESS_MEMBER_ID']) == '')) {
echo "<span class='show_all'>";
echo "<a class='show' href='admincp.php'>&nbsp;&nbsp;Admin</a>";
echo "</span>";
echo "<span class='show_all'>";
echo "<a class='show' href='logout.php'>&nbsp;Logout</a>";
echo "</span>";
} else {
echo "";
}
?>

with the line, " while ($row9 = mysql_fetch_assoc ($result9)) {"   being line 129

any help would be much appreciated!

Thank you, Martin

hi everyone   i keep seeing the following Comparison Operators: 

<>

i see it used in the following context:

if ($connection <> 'SSL')
    {
    $connection = 'NONSSL';
}

be grateful if somone would tell me what it means, i looked online but could not find the symbol   thanks

In php is there a way to shortcut logical operators... example:

Code: [Select]
if ($row['CustomerSaas'] == 'Yes' && ($row['CustomerSaasPaidStatus'] == 'Trial' || $row['CustomerSaasPaidStatus'] == 'Trial Ended')) {
to
Code: [Select]
if ($row['CustomerSaas'] == 'Yes' && ($row['CustomerSaasPaidStatus'] == 'Trial' || 'Trial Ended')) {