PHP - Nesting Operators

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')) {

While going through an instructional book, I ran across some code that I didn't immediately understand.  I've stripped it down to the relevant bits:


function example($object_a, $object_b) {

  $compare = $object_a->id == $object_b->id;

  return another_function('argument 1') && $compare || another_function('argument 2');

}



My first confusion was this line:
$compare = $object_a->id == $object_b->id;
Does this set $compare to TRUE if the ids match and FALSE if they do not?

And the second confusion:
return another_function('argument 1') && $compare || another_function('argument 2');
What is returned if the ids match?  What is returned if they are different? 

When I try testing this out on my machine, it returns both functions whether or not the ids match, but I know that's not what's supposed to happen.  Can anyone break this down for me?

Thanks.

Hello.

Im having trouble using a Tempory Operator in a list. maybe someone might know a way around it.

so the list below has 3 Tempory Operators.

the first 1 looks for pages with links that are internal links
the first 2 looks for pages with links that are external links
the first 3 looks for pages with links that have no links

if the link is a "nonTitle" it will be a normal list item
if the link is a "title" it will be a header for a sub list (class="subexpandable")

the problem is that every time it gets to the '; at the end of each Tempory Operators it breaks



THIS IS NOT WORKING
Code: [Select]
<ul>
//FIND INTERNAL LINKS
echo $type == "internal" && $list == "nonTitle" ? '<li><a href="index.php">'.$title.'</a></li>' : '<li><a href="index.php" class="subexpandable">'.$title.'</a>';


//FIND EXTERNAL LINKS
echo $type == "external" && $list == "nonTitle" ? '<li><a href="http://www.url.com">'.$title.'</a></li>' : '<li><a href="http://www.url.com" class="subexpandable">'.$title.'</a>';


//FIND NON LINKS
echo $type == "non" && $list == "nonTitle" ? '<li><a>'.$title.'</a></li>' : '<li><a class="subexpandable">'.$title.'</a>';


                //GET SUB LINKS
echo'
<ul class="subcategoryitems" style="margin-left: 15px">
                <li><a href="">sub link</a></li>
</ul>
        </li>
</ul>';





If i put the sub level inside of each type it works but then i keep having to use the same code over.



THIS IS WORKING

Code: [Select]
<ul>
//FIND INTERNAL LINKS
echo $type == "internal" && $list == "nonTitle" ? '<li><a href="index.php">'.$title.'</a></li>' : '<li><a href="index.php" class="subexpandable">'.$title.'</a>
                <ul class="subcategoryitems" style="margin-left: 15px">
                <li><a href="">sub link</a></li>
</ul>
        </li>';


//FIND EXTERNAL LINKS
echo $type == "external" && $list == "nonTitle" ? '<li><a href="http://www.url.com">'.$title.'</a></li>' : '<li><a href="http://www.url.com" class="subexpandable">'.$title.'</a>
<ul class="subcategoryitems" style="margin-left: 15px">
                <li><a href="">sub link</a></li>
</ul>
        </li>';


//FIND NON LINKS
echo $type == "non" && $list == "nonTitle" ? '<li><a>'.$title.'</a></li>' : '<li><a class="subexpandable">'.$title.'</a>
<ul class="subcategoryitems" style="margin-left: 15px">
                <li><a href="">sub link</a></li>
</ul>
        </li>';

</ul>';




so is there a way to do the first example without having to do the second example



thanks
ricky

Hello
I'm trying to use PHP "for loops" to build a table of 10 rows with 5 columns and I'm sure there's a better way to do this, but the result is the page won't fully load and continually spins its wheel. Here's the code:

Code: [Select]
$states = array(1 => 'AK','AL','AR','AZ','CA','CO','CT','DC','DE','FL','GA','HI','IA','ID','IL','IN','KS','KY','LA','MA','MD','ME','MI','MN','MO','MS','MT','NC','ND','NE','NH','NJ','NM','NV','NY','OH','OK','OR','OZ','PA','PR','RI','SC','SD','TN','TX','UT','VA','VT','WA','WI'
);

<table id="stateCheck">
            <?php
             for ($i = 1; $i <= 10; $i++) {
                 echo '<tr>';
                    for ($j = 5*$i; $j <= $j+4; $j++) {
                     echo '<td>
                              <input type="checkbox" name="state" value="'.$states[$j].'" /> '.$states[$j].'
                          </td>';
                    }
                    echo '</tr>';
                }
            ?>
            <tr>
                <td>
                    <input type="checkbox" name="state" value="WV" /> WV
                    </td>
                   
                    <td>
                    <input type="checkbox" name="state" value="WY" /> WY
                    </td>
                </tr>
            </table>
Is it breaking because I'm using arithmetic operators to define the nested for loop?

Many thanks

Here is a simple script which uses bitwise operations to determine whether or not a checkbox has been set. The problem is that if you use the $alpha array, the script doesn't produce the results you should expect. For example, if you set the last checkbox while using the $alpha array, all the checkboxes become set.

I partially know why this happens as the PHP-Manual enlightened me:
Quote

From: http://www.php.net/manual/en/language.operators.bitwise.php
Don't right shift for more than 32 bits on 32 bits systems. Don't left shift in case it results to number longer than 32 bits.


I attempted to use the GMP_* functions but because those aren't part of the PHP-Standard-Library, I do not wish to rely on them. Is there any way to make these functions work for integers beyond 2^31?

Here is a standalone script I'm using to make these tests.

$alpha = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z');

$delta = range('a', 'z');

function generate($array){

$n = count($array);

$c = array();

for($i = 0; $i < $n; ++$i){

$c[bcpow(2, $i)] = $array[$i];

}

return $c;

}

function set($array, $post){

$c = 0;

foreach($array as $key => $val)

if(isset($post['c'.$key])) $c |= $key;

return $c;

}

function check($num, $category){

if($num & $category) return 'CHECKED';

return '';

}

function checkboxes($array, $numval=0){

$i = 0;

$form = '';

foreach($array as $key => $val){

$checked = check($numval, $key);

$form .= '<input type="checkbox" '.$checked.' name="c'.$key.'" id="c'.$key.'">' . '<label for="c'.$key.'"> '.$val.'</label><br />';

++$i;

}

return $form;

}

$array = generate($alpha);

$num = 0;

if(isset($_POST['action'])){

$num = set($array, $_POST);

echo $num;

}

echo '<form action="y.php" method="post" style="width: 400px; border: 1px solid black;">';

echo checkboxes($array, $num);

echo '<input type="submit" name="action" value="Set" />';

echo '</form>';

I was looking at the manual:   http://php.net/manua....precedence.php   And I notice that the parenthesis () operator and print operator are missing from the list. Why so? I would like to know where these operators fall in the precedence and associativity chart.

Can someone help me understand parentheses structure?

Why here does the second empty() have no parentheses before it and an extra parentheses at the end?

if (empty($subject) && empty($text)) {
....

And here, why is there an extra parentheses at the end?

if (empty($subject) && (!empty($text))) {
...

And here, why double parentheses in the 1st empty() and none before the 2nd empty() ?

if ((!empty($subject)) && empty($text)) {
...

Thank You!   

michael

I'm using the following code. I have tried placing parenthesis around $date1 and $date2 to separate them. No matter where I place the parenthesis  Dreamweaver keeps giving me a syntax error. If I remove the second operator $date2 with the && the error goes.

checked all my books but I can't see what is probably a stupid error !

Code: [Select]
if ($row_sales_shipping_tax['cdate']  >= $date1 && <=$date2 )
Thanks for the help !

This code returns part but not all of what I'm asking it to do.
Variable $av1 is drawn from the database and always has a value of 1 or 0 (tinyint).
If value is 1 a green ON is displayed and if 0 a red OFF is displayed. That works.
The variable $group1 exists or not, and if exists the code should proceed and if not exist there should be a display of "".
In other words, I do not want to see any display if $group1 does not exist, but this is not working. There is always a display.
Can anyone point out my mistake?

Code: [Select]
<?php 
if($group1 != "") {
{
echo "<input type='radio' name='1' value='$group1' />"; ?>&nbsp;&nbsp;<?php echo $group1; 
}
?>
        is switched
<?php 
if($group1 != "") if($av1 !== 0) echo ("<span style=\"color:#080\">ON</span>"); 
else echo ("<span style=\"color:#F00\">OFF</span>");
}else{
echo "";
}
?>

I am writing a script that can handle either csv or xls files.  Once the data is parsed for either type it goes into an array $data  and all the same operations are done on it.

Right now, it is only set up to handle a csv file.

This is the code I have right now:


//Load the CSV files in the UPLOAD_PATH directory
$fileList = $fs->loadFiles(UPLOAD_PATH, "csv");

// Loop through fileList array to processes each file
foreach($fileList as $filename) {
// Attempt to open the next file in the list and process it.
if (($handle = fopen(UPLOAD_PATH.$filename, "r")) != FALSE) {

// Create the input array
while(($data = fgetcsv($handle, 0, ",")) != FALSE) {

               // ... do the magic


How do I add another set of instructions to goto the parseXLS function that performs basically what fgetcsv does?

I think in this case a try...catch statement would be too loose, and wouldnt be the best way.

What I would LIKE to do is


if (a csv file) {
  while(($data = fgetscv($handle, 0, ",")) != FALSE) {
} else if (an xls file) {
  while ($data = parseXLS()) {
}

// Do the magic
} // end of while



I know this won't work but i need to do something along those lines.  Any ideas?

if($AClass->select_error || $BClass->ErrorFile){
include("/path/to/files/".($AClass->select_error ? 'no_selector' : 'error_file_missing').".php");
exit;
}

if($CClass->WriteError){
include("/path/to/files/FileWriteError.php");
exit;
}



Probably a simple one for you folks, but I can't for the life of me work out how to make the above into 1 line of ternarys.

Cheers,
Rw

I think this is the right place to post this but please move if needed as this is my first time on this site.

You can also contact me through AIM: MadLittleMods@gmail.com

Okay so I have a multidimensional array that is giving me an error when I put it in a function:
ERROR: Warning: Invalid argument supplied for foreach().. line 123
LINE 123: foreach ( $affiliates as $affiliate )

This does work when in one file test2.php which is attached to this post...

Here is my whole function:

// affiliate content function start:
function affiliates_content()
{

global $context, $settings, $options, $scripturl, $txt;

foreach ( $affiliates as $affiliate ) 
{

echo '
<table>

<tr>
<td>
<a href="',$affiliate[href],'"><img src="',$affiliate[image],'"></a>
</td>

<td>
',$affiliate[title],'
<br>
<small><a href="',$affiliate[href],'">',$affiliate[href],'</a></small>
</td>
</tr>

</table>

<br>


';

}



}
// affiliate content function end


Here is my whole array which is located on another file (subs.php - smf)

// affiliates array for affiliates page
$affiliates = array(
  array(
    "title" => "aff_blah1",
    "image" => "http://aff_blah1.net/images/aff_blah1.png",
    "href" => "http://aff_blah1.net/"
  ),

   array(
    "title" => "aff_blah2",
    "image" => "http://aff_blah2.net/images/aff_blah2.png",
    "href" => "http://aff_blah2.net/"
  ),

   array(
    "title" => "aff_blah3",
    "image" => "http://aff_blah3.net/images/aff_blah3.png",
    "href" => "http://aff_blah3.net/"
  ),
);
// affiliates array end



Does anyone know how to fix this problem?

Hi all,
I'm new to php and I was trying to send the results of one query to another query. I need the results of both queries.
Here are the queries

$cui1 = mysql_query("SELECT DISTINCT CUI FROM MRSTY WHERE STY='ABC' ");

$cui2 = mysql_query("SELECT DISTINCT CUI FROM MRSTY WHERE STY='XYZ' ");

I want to know if this is possible
$cuis = mysql_query("SELECT CUI1,CUI2,REL FROM MRREL WHERE CUI1 IN $cui1 OR CUI1 IN $cui2 ");

Thanks.