Array store many variable

sungpeng · May 8, 2009

$arr = array("somearray" => array($var => $var));

The $var value will keep changing. I need the "$arr" to store all the value that passed the $var. Like say index number 45 passed stored in $arr. index number 60 passed stored in $arr etc.

Result

$arr = array("somearray" => array(45 => 45, 60 => 60));

Is there a way to do it?

Ken2k7 · May 8, 2009

You can do that, yeah. Is it failing in your code?

sungpeng · May 8, 2009

Thank for telling me the above draft code is feasible. Another question link.

<?php
$arr = array("somearray" => array(6 => 5, 13 => 9, "a" => 42));

echo $arr["somearray"][6];    
echo $arr["somearray"][13];  
echo $arr["somearray"]["a"];  
etc
?>

Can I have a "while" or "for" loop for (one echo $arr["somearray"][]; statement only) to echo all data in $arr instead of manually one by one key in echo $arr["somearray"][6];, echo $arr["somearray"][13];, echo $arr["somearray"]["a"];.

premiso · May 8, 2009

foreach ($arr['somearray'] as $key => $val) {
    echo "{$key} => {$val}<br />";
}

foreach

sungpeng · May 8, 2009

foreach ($arr['somearray'] as $key => $val) {
   $indexnumber ="{$key} => {$val}";
$query=mysql_query("select*from table where id=$indexnumber");
}

Check is it possible to code it in this way?

premiso · May 8, 2009

What signifies an ID number. The key of the array index or the value. Use either or. The echo statement was to just show you it can be done and a rough example of how it is done. If you want the index use $key if you want the value of that index use $val. Simple as that.

However, seeing as you want to use them in a MySQL statement, I would suggest looking into array_keys and implode:

If you want to use the keys:

$query = mysql_query("SELECT * FROM table WHERE id IN('" . implode("', '", array_keys($arr['somearray'])) . "') ORDER BY id");

Of the values:

$query = mysql_query("SELECT * FROM table WHERE id IN('" . implode("', '", $arr['somearray']) . "') ORDER BY id");

Using the above two methods (either or) will be way more efficient than looping through your code and running a query for each item.

sungpeng · May 8, 2009

<?php
session_start();
$indexnumber=$_GET[rid];
$arr = array("somearray" => array($indexnumber => $indexnumber)); 
$_SESSION['views']=$arr;

?><html>
<body><?php
$arr=$_SESSION['views'];
foreach ($arr['somearray'] as $key => $val) {
  
$query=mysql_query("select*from table where id=$val");
}
?></body>
</html>

Ok Thank check again why the above code cannot work?

sungpeng · May 8, 2009

Ok above is the final result that I need. It still not working so I will break it apart to test.

<?php
session_start();
$indexnumber=$_GET[rid];
$arr = array("somearray" => array($indexnumber => $indexnumber)); 
$_SESSION['views']=$arr;

?><html>
<body><?php
$arr=$_SESSION['views'];
echo $arr["somearray"]["indexnumber"];  


?></body>
</html>

Can I know why the about code not working?

Ken2k7 · May 8, 2009

Because you're indexing the array by the variable $indexnumber and not the string. Which do you want?

From the topic, I guess you want this:

echo $arr['somearray'][$indexnumber];

Although I don't know why you would do that rather than just:

echo $indexnumber;

sungpeng · May 8, 2009

I am going to store many $indexnumber in $arr. Then call out one by one in mysql statement. It is still not working.

<?php
session_start();
$indexnumber=$_GET[rid];
$arr = array("somearray" => array($indexnumber => $indexnumber)); 
$_SESSION['views']=$arr;

?><html>
<body><?php
$arr=$_SESSION['views'];
echo $arr['somearray'][indexnumber];  


?></body>
</html>

sungpeng · May 8, 2009

The problem I have is to store many products in session array then check out, view all products without the person who is using it log in to the account. If you have better solution, tell me.

Ken2k7 · May 8, 2009

Storing many $indexnumber in $arr won't make a difference because the last one will just overwrite the other ones. :-\

And indexnumber is a constant. Use $indexnumber. Learn to read.

sungpeng · May 8, 2009

How to make it not overwrite the other ones.

intended result

$arr = array("somearray" => array(5 => 5, 9 => 9, 42 => 42));

It will store all variable passed.

Amend

Need to store many products in session array then check out, view all products without the person who is using it log in to the account.

Ken2k7 · May 8, 2009

Um... unless I misinterpreted, I think you would want to use a database for what you want to achieve.

sungpeng · May 8, 2009

Is primary id for mysql be the IP address? I need to assign a temporary name to the user as the user is not log in. I still think is possible to use session array. Just the method of inputing into the array.

sungpeng · May 9, 2009

<?php
session_start();
$indexnumber=$_GET[rid];
$arr1 = array("somearray" => array($indexnumber => $indexnumber)); 
$arr2=$_SESSION['views'];
$arr=array_combine($arr2, $arr1);
$_SESSION['views']=$arr;

?><html>
<body><?php
$arr=$_SESSION['views'];

foreach ($arr['somearray'] as $key => $val) {
    echo "{$key} => {$val}<br />";
}


?></body>
</html>

Just checking why about code cannot work? I still think is possible to use session array to store all indexnumber passed.

Ken2k7 · May 9, 2009

man array_combine

Read that. I'm assuming you have no idea what the function does and just applied it blindly.

sungpeng · May 9, 2009

<?php
session_start();
$indexnumber=$_GET[rid];
$arr1 = array("somearray" => array($indexnumber => $indexnumber)); 
$arr2=$_SESSION['views'];
$arr=array_merge($arr2, $arr1);

$_SESSION['views']=$arr;

?><html>
<body><?php
$arr=$_SESSION['views'];

foreach ($arr['somearray'] as $key => $val) {
    echo "{$key} => {$val}<br />";
}


?></body>
</html>

It's seen possible to use array merge?? I have seen people use session to store many id and later display all "shortlisted" in one page but I just cannot figure out how?

sungpeng · May 9, 2009

<?php
session_start();
include ("".$_SERVER['DOCUMENT_ROOT']."/config.php");
$query=mysql_query("select * from stats where id='1'" );
$row=mysql_fetch_array($query);

$count="$row[counter]";
$_SESSION[$count]=$_GET[rid];

?><html>
<body><?php


while($index<=10000)
  {
$arr =$_SESSION[$index];
echo "$arr";  

  $index++;
  }


?></body>
</html>

row[counter] is a counter that will add one once you click on this page, it is within 10000. I don't see any problem in above code but why it cannot work. It time to use database.

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Array store many variable

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