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PHP - Shortcutting Logical Operators
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')) { Similar TutorialsI made a bot, that scrapes content from a forum, i cant access the forum in work, so am trying to make something discreat to read it on my own site while at work. Anyway the links to threads are something like this. I got help and i know how to extract the unique thread number using regex. However i have a problem. What i really need, now that i think about it, is a way of getting the thread number and the thread title (so i can make sense of what im reading.) The thread title is in the setWindowStatus function. I cant think of a way to do it. I dont even know if it would work in an array what id basically like is something that says 1) Thread title - Thread id 2) Thread title - Thread id etc that is stored in a way that i can easily manipulate. Code: [Select] <img src="http://s2.images.proboards.com/xx.gif" alt=" " border="0"/></font></td><td class="windowbg" bgcolor="FFFFFF" width="48%" style="cursor:pointer;" onClick="if(!pb_bubble)location.href='/index.cgi?board=general&action=display&thread=13483';" onMouseOver="mouseOverHighlightCell(this);setWindowStatus('Lurkers, show your face ');return true; Okay i'm trying to compare these sets of variables. code looks like this.. Code: [Select] if( $row->cash > $finalcash && $row->core1 > $finalcore1 && $row->core2 > $finalcore2 && $row->core3 > $finalcore3 && $row->core4 > $finalcore4 ) { return true; } else { return false; } First question is this the appropriate way of doing this? Or would a nested if statement work better? example: Code: [Select] if ($row->cash > $finalcash) { if ($row->core1 > $finalcore1) { if ($row->core2 > $finalcore2) { if ($row->core3 > $finalcore3) { if ($row->core4 > $finalcore4) { } else { return false; } } else { return false; } } else { return false; } } else { return false; } } else { return false; } I know it looks pretty messy, so i'm wondering if anybody is aware of an alternative to achieving this? i have two tables assume question and answer question table consists of Question_Date, Question_id and Question_title answer table consists of Answer_Date, Question_id, Answer_id and Answer_title let say i have 1000 records and i wish to display only the last 100 records combining both question and answer. How can i do this with loop..any suggestion would be appreciate thanks im trying to make a salary system which would display a month salary according to login hours so i got two different tables storing data like
1. users table id, name, password, salary
2.attendance table id, user_id, Employee_Name, Remark, Login_Hours, Date
so what im looking to do is fetch all users id, name and salary from users table and then match it with attendance user_id,Employee_Name ,Login_Hours, table and then also count numbers of result for a particular year-month so that i could do the hourly wage calculation.
could someone help out i got no idea how to achieve it
apprieciate your help,
thanks
i tried something like this it does output something but still dunno how to match results of both tables and get result
$date = '2014-11';
$query1 = "SELECT COUNT(*) as num FROM attendance WHERE Date LIKE '%".$date."%' AND Employee_Name='moses'";
$total_pages = mysql_fetch_array(mysql_query($query1));
$total_res = $total_res[num]; // total rows counting of total office days of a month
$result2=mysql_query("SELECT id, user_id, Employee_Name, Remark, SUM(Login_Hours), Date FROM attendance WHERE Employee_Name='moses'");
while($row = mysql_fetch_array($result2)){
echo $sal_to_month = 9000/$total_res; //9000 is salary should be fetched from users table
echo '<br/>';
echo $sal_to_month/9*$row['SUM(Login_Hours)'];
}
Hi there,
This may not be the correct space to post this - but I'm very new to all this.
I've created a page that will run a php script to output a query. I would then like to send that same query via email - however from a design perspective I don't think the correct process is to click 'submit' to view the query and then 'submit' to send the result via email?
Can you please advise on some design solutions regarding this issue?
Thanks!
Hi guys, i'm trying to increment a variable / session value whenever 'submit' comes in the POST. I can't seem to get around the logic of this. Code looks like this: Code: [Select] $var = 0 if($_POST('submit'){ $_SESSION['var2'] = $var++; } What I want it to do is increment the value of the session index everytime a user clicks 'submit'. But because i've reset $var to 0 everytime, it's always just going to stay at 1. I just can't think of a way to achieve this, does anyone have any clue on how I can? fixed. 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; 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'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 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. Hi every one, I just want to know what is the use of '<<' and '>>' operators in php hi everyone
i keep seeing the following Comparison Operators:
<>i see it used in the following context:
if ($connection <> 'SSL')
{
$connection = 'NONSSL';
}
be grateful if somone would tell me what it means, i looked online but could not find the symbol
thanks
While going through an instructional book, I ran across some code that I didn't immediately understand. I've stripped it down to the relevant bits: function example($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 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 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 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 ! 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 |
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