PHP - Probably A Really Easy Newbie Question: Overriding Sql Returns For Testing..

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 want to know what is *$ or +$ because i see it in many contact forms. also, what is the difference between these:
/^[A-Z]+[a-z]*$/
/^[A-Z]+[a-z]+$/
/^[A-Z]+[a-z]$/
/^[A-Z]+[a-z]/

also, which is the shortest and efficient method of checking somebodys name to be exactly "Name Surname" - "Green Trancer" ? in my form, i use
var filter = /^[A-Z]+[a-z]*$/;
var filter2 = /^[A-Z]+[a-z]+\s+[A-Z]+[a-z]+$/;
and then i check the name to be like filter or filter2.

how can i check that between the words to be exactly one space character ?

thank you very much.

So I am extending the DateTime class and would like to completely disable the modify() function that is built in so i have this:
Code: [Select]
<?php
class NewDateTime extends DateTime
{

public function modify()
{
throw new Exception('modify() has been disabled.');
}
}

thats not the entire class description, just the pertinent part of course

now any time I create a new object from NewDateTime I get this message at the top of the screen:

Quote

Strict Standards: Declaration of NewDateTime::modify() should be compatible with that of DateTime::modify() in C:\xampp\htdocs\.....my file path here.....\NewDateTime.php on line 62


what gives? how do I get rid of this and still disable modify()? I'm betting its a setting that i have wonky but I am really rusty in php so dont know where to look in php.ini

Hey people!

I've been setting a coding script for experience and this is my situation:

To buy a virtual flower, one needs to have 50 virtual coins.
So I first extract the number of coins the person has from the DB.
If the user doesn't have the sufficient number of coins, the BUY button will not be available and vice versa.

When the BUY button is clicked, I update the database, adding the flower to the user's inventory and subtracting 50 from the total number of coins the user has. This I do in that page itself using
if(isset($_POST['submit'])) 

Now, I need to know how I could check whether the user has at least 50 coins even if the button is available.
I hope that you could understand this.
I want to do it for validation purposes. Its to prevent the user spending the coins he has in another browser window and then returning to the visible button to click it.

I hope that I make sense. Thanks in advance!

Regards,
Thauwa

Hello Everybody   I usually work with C#, but I'm doing a website right now and have a question: I want a picture in my header and when I change the window size the image may not move.   My code so far:

#a1 { 
position: relative;
top:-175px; left:0px; width:50px; height:50px;
background-image:url(http://domain.png);
      background-repeat:no-repeat;}
</style>

Hope someone can answer this question easy

I'm trying to search the 'ad' column where 'ad' = 1 or 3

I'm having problems doing this.

Here is what I currently have, but it is not bringing back 'ad' where ='1' (for obvious reasons)
Quote

    $query = "SELECT * FROM users WHERE ad='3' AND state='$state1'";



Here is what I thought would work, but it displays every listing in my database when I do it this way.

Quote

    $query = "SELECT * FROM users WHERE ad='3' OR ad='1' AND state='$state1'";




Thank you in advance for your answers, google is not being so kind to me right now.

How can I use an include file that has a list of links in any directory at my website without breaking those links?

You can see it in action here...

The links in this directory work...

https://www.billelgin.com/primary-directory/

The links in this directory (being created from the same include file) do not work...

https://www.billelgin.com/primary-directory/subsection-one/

Obviously the problem is the include file is being called from different directories, so it's breaking the relative path links in the include file, but what can I do to fix it?

You can download the example directory structure here...

https://www.billelgin.com/EXAMPLE.zip

Alright, so I just started picking up PHP again and I have a pretty simple question. I have a html form that takes a string then writes it on another page. My problem is when I use quotations I'll get slashes in them on the page it writes the string on.

Is there a way to clean that stuff up?

I am very new to php and am trying to create a simple application that uploads a PDF file to a database. I have one field for the Volume Number and on file field for the PDF to be uploaded. My issue is i can't get the PDF to upload or insert the name of the pdf (eg volume1.pdf) into the data base.

I would also like to point out that I know i have a low post count, but i only seek help when i truly need it and have exhausted all other resources...

Here is what i have, please go easy on me this is my first round at php:
Code: [Select]
<?php
if(isset($_POST['submit'])){
$vol_num = $_POST['vol_num'];
$pdf = $_FILES['pdf']['name'];
$path = '../pdf/'.$_FILES['pdf']['name'];
move_uploaded_file($_FILES["pdf"]["tmp_name"], $path);
        mysql_query("INSERT INTO volumes set vol_num='$vol_num', vol_link='$pdf'") or die (mysql_error());
echo "<script>location.href='add_volume.php'</script>";
}
?>
what am i doing wrong here?

Thanks in advance

Hye there im branded new in php here. Im trying to develop a system based on php and mysql.
I have 20 fields on my database table. Im trying to separate fields into 2 forms which is each form contain 10 fields
- form_1.php(contain 10 fields)
-form_2.php(contain 10 fields)

form_1.php and form_2.php is connected each other which is user have to insert data in the form_1.php and then there are NEXT button that will bring user to form_2.php.In the form_2.php there will be a SUBMIT button which send data to database.
Im trying to do but i cannot go through can someone show me any way to ??

I'm just learning PHP as a first language so you'll probably see my around here quite a bit!

I'm completely baffled at why this isn't working and after about 30 minutes of frustration I decided to seek some help lol.

Code: [Select]
require '/opt/lampp/htdocs/PHP/Chapter 3/scripts/app_config.php';
//database connection code

if (mysql_connect($db_host, $username, $password) != false) {
mysql_select_db("db_name");
echo "MySQL Database Selected";
}
else {
echo "Error connecting to database";
}
app_config.php
Code: [Select]
<php
// Database Connection Constants

$db_host = "";
$username = "";
$password = "";
$db_name = "chp3";
?>
results:
Notice: Undefined variable: db_host in /opt/lampp/htdocs/PHP/Chapter 3/scripts/connect.php on line 6

Notice: Undefined variable: username in /opt/lampp/htdocs/PHP/Chapter 3/scripts/connect.php on line 6

Notice: Undefined variable: password in /opt/lampp/htdocs/PHP/Chapter 3/scripts/connect.php on line 6


Any help is appreciated.

Hi, I'm REALLY new to PHP, so any help would be appreciated .  I'm trying to make a script that truncates a post after a certain amount of words (Below).  And I suppose the article would have to have $description="blahblahblah";.  My question is; how would I go about making this script actually work?  Where would I put the code and the articles? Like I said, I have less than 2 days experience with PHP, so please don't judge
Code: [Select]
// this signifies how to truncate
function myTruncate($string, $limit, $break=".", $pad="...")
{
  // return with no change if string is shorter than $limit
  if(strlen($string) <= $limit) return $string;

  // is $break present between $limit and the end of the string?
  if(false !== ($breakpoint = strpos($string, $break, $limit))) {
    if($breakpoint < strlen($string) - 1) {
      $string = substr($string, 0, $breakpoint) . $pad;
    }
  }

  return $string;
}
And the code that says when to truncate:
Code: [Select]
// replace 'xxx' with the number desired

  $shortdesc = myTruncate($description, XXX);
  echo "<p>$shortdesc</p>";

hi I'm a newbie in php and I came across this

Code: [Select]
if($_SERVER['REQUEST_METHOD'] == 'POST'){

and this
Code: [Select]
$_POST = $this->_params;

I know this might be a stupid question but can you please tell me what they are

After looking around the net and getting i feel close i though i would post and ask you all.

I am trying to add x number of names to a database each on its own row. I found some code and have edited it and i understand most of what its doing but i cannot get it to work, it just add witch ever name was last.

Here is the form code just with 3 test fields.
Quote

<form id="form1" name="form1" method="post" action="addplayer2.php">
       <p>
        <input name="player[]" type="text" id="player[]" size="15" />
      </p>
         <p>
        <input name="player[]" type="text" id="player[]" size="15" />
      </p>
         <p>
        <input name="player[]" type="text" id="player[]" size="15" />
      </p>
 <input type="submit" name="submit" id="submit" value="Submit" />
</form>


Ok this the script i found in it unedited state, i thought i would be easy to understand if you saw it before i broke it.

I tried changing the word Activity to player and the work Act to play and then changing all other referanced.
Quote

<?php
$con = mysql_connect("localhost","Application","*******");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}

mysql_select_db("CpaApp", $con);

foreach($_POST['Activity'] as $row=>$Act)
{
$Activity=$Act; // why does this not have post? Or is it using the one above?
$Position=$_POST['Position'][$row];
$StartDate=$_POST['StartDate'][$row];
$EndDate=$_POST['EndDate'][$row];
}


//enter rows into database
foreach($_POST['Activity'] as $row=>$Act)
{
$Activity=mysql_real_escape_string($Act); // Same question why no $_POST? does it use the one above?
$Position=mysql_real_escape_string($_POST['Position'][$row]);
$StartDate=mysql_real_escape_string($_POST['StartDate'][$row]);
$EndDate=mysql_real_escape_string($_POST['EndDate'][$row]);
}


$involv = "INSERT INTO Involvement (Activity, Position, StartDate, EndDate)
VALUES ('.$Activity.','.$Position.','.$StartDate.','.$EndDate.')";


if (!mysql_query($involv,$con))
{
die('Error: ' . mysql_error());
}
echo "$row record added";

mysql_close($con)
?>


On filling out the fields with name lets say Paul Bill and Jack it echos that it has added x number of rows but when looking in the database it has only added the last in this case Jack.

If there is anyone willing to edit the code above so it will work with my single field i would be very great full, also if someone would answer the questions i placed in the script that would be great also.

Many thanks.
Lister471

Hello,  I'm new to PHP/MySQL.  Here's the situation: I have a simple little database called, "quiz."  (I want to keep it simple until I figure out what I'm doing.)  This database has one user, me, and two tables: Questions (QuestionID, QuestionText), and Answers (QuestionID, OptionText)  QuestionID is set to autoincrement.  I have one record so the biggest QuestionID is 1.

Here is the php file:

 <?php
$link = mysql_connect('PathToMySQL', 'MyUsername', 'MyPassword');
 if (!$link) {
  die('Could not connect: ' . mysql_error());
}
echo 'Connected!';
mysql_select_db(quiz);
$sql = 'SELECT QuestionID, MAX(QuestionID) FROM Questions;';

// everything works great until this point
// but I want the store the data into a variable so the
// answer form will know what QuestionID to assign to the answers.
// So I tried the following:

echo $sql;

// but that just echoed the query itself, not the result.
// I got: Connected!SELECT "QuestionID, MAX(QuestionID) FROM Questions;"
// I was expecting to see: "Connected!1"

// close database
mysql_close($link);
?>

 

I need to capture the value of QuestionID to pass that to the answers.  How do I do that?

Thank you all for this forum, and for any answers.  That PHP manual is thick and complex.  I always hate being a newbie.  I have been in Newbieville for several languages now; this is no different.  I can say from experience that the good news is that it gets better!

 

Richard Hollenbeck