how to make static index of array in php

Question

I am trying to store values from form radio to array. But problem which i am facing is that every time array 1st index is replaced with new value. I believe this is scope problem. I also tried to declare global array but no success.

Here is the code:

<?php
include_once("connection.php");
$c = new DBcon();
$c->startcon();
global $array; // not effecive
//  $q = $_POST['t'];
//  echo 'fff', $q;


$page = $_GET['page'];
echo 'pagesss', $page, 'ppp';
if ($page == "") {

    $page = "1";
} else {

    // If page is set, let's get it
    $page = $_GET['page'];
}

// Now lets get all messages from your database
$sql = "SELECT * FROM quizes";
$query = mysql_query($sql);

// Lets count all messages
$num = mysql_num_rows($query);

// Lets set how many messages we want to display
$per_page = "2";

// Now we must calculate the last page
$last_page = $num;

echo 's', $num;

// And set the first page
$first_page = "1";

// Here we are making the "First page" link
echo "<a href='?page=" . $first_page . "'>First page</a> ";

// If page is 1 then remove link from "Previous" word
if ($page == $first_page) {

    echo "Previous ";
} else {

    if (!isset($page)) {

        echo "Previous ";
    } else {

        // But if page is set and it's not 1.. Lets add link to previous word to take us back by one page
        $previous = $page - 1;

        echo "<a href='?page=" . $previous . "'>Previous</a> ";
    }
}

// If the page is last page.. lets remove "Next" link
if ($page == $last_page) {

    echo "Next ";
} else {

    // If page is not set or it is set and it's not the last page.. lets add link to this word so we can go to the next page
    if (!isset($page)) {

        $next = $first_page + 1;
        echo "<a href='?page=" . $next . "'>Next</a> ";
    } else {

        $next = $page + 1;
        echo "<a href='?page=" . $next . "'>Next</a> ";
    }
}

// And now lets add the "Last page" link
echo "<a href='?page=" . $last_page . "'>Last page</a>";

// Math.. It gets us the start number of message that will be displayed
$start = ($page * ($page - 1)) / $page;
echo 'start', $start;
echo 'page', $page;
// Now lets set the limit for our query
$limit = "LIMIT $start, $per_page";

// It's time for getting our messages
$sql = "SELECT * FROM quizes $limit";

$query = mysql_query($sql);

echo "<br /><br />";

// And lets display our messages

$i = 0;
$l = 0;

while ($row = mysql_fetch_array($query) or die(mysql_error())) {
    $a = $row['A'];
    echo '<form method="get" action="?page=".$next."">';
    while ($row = mysql_fetch_array($query)) {

        echo '<div class="boxed" >';

        echo "\t" . '<tr><th>' .
        $row['question'] . "<br>" .
        '</th><th>' . "<input type='radio' name= 't[]' value='{$row['A']}'>" . $row['A'] . "<br>" .
        '</th><th>' . "<input type='radio' name='t[]' value='{$row['B']}'>" . $row['B'] . "<br>" .
        '</th><th>' . "<input type='radio' name='t[]' value='{$row['C']}'>" . $row['C'] . "<br>" .
        '</th><th>' . "<input type='radio' name='t[]' value='{$row['D']}'>" . $row['D'] . '</th>
                </tr>';
        echo '<input type="hidden" name="page" value="' . $next . '">';
        echo '<input type="submit" name="submit"/>';
        $i++;

        echo '</div>';


        echo '</div>';
    }
    echo '</form>';
    if (isset($_GET['submit'])) {
        $example = $_GET['t'];
        foreach ($example as $value) {
            $array[$i++] = ($value);

            echo "$array[0] <br>"; // printing correct statement but replacing old values with new value everytime.
            echo "$array[1] <br>"; // 0 values
            echo "$array[2] <br>"; // 0 values
        }
    }
}
?>

I have seen these posts: PHP array indexing: $array[$index] vs $array["$index"] vs $array["{$index}"] , PHP - define static array of objects but no help. Kindly help what should i do?

One thing, instead of doing a mysql_row_count at the beginning just do a query like: "SELECT count(*) FROM quizes" since it will only return one value, otherwise you transfer more data than necessary to get the same value from the database. Second do a var_dump of the $example value to see what you get as a response to your form. — MiltoxBeyond
– MiltoxBeyond, Commented Jan 13, 2016 at 7:13
var_dump yeah but i am unable to add values in array. Instead it is only adding and replacing value on 1st index not on others. — Malik
– Malik, Commented Jan 13, 2016 at 7:20
Make sure you print out the $i value too in the loop to be sure that it is setting the value correctly. — MiltoxBeyond
– MiltoxBeyond, Commented Jan 13, 2016 at 7:26
i have written count query in this way: $count = "SELECT count(*) FROM quizes "; $cnt = mysql_query($count); echo 'count',$cnt; is it wrong? — Malik
– Malik, Commented Jan 13, 2016 at 7:32

Victor Radu · Accepted Answer · 2016-01-13 07:33:25Z

2

You cannot do

$array[$i++]

this will always be $array[1] instead do

$i++;
$array[$i]= $value;

P.S. $array is a terrible name for a variable...

answered Jan 13, 2016 at 7:33

Victor Radu

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1 Comment

Malik Over a year ago

i did but value is storing in the 1st index and replacing old value with new in 1st index

Charanjeet Singh · Accepted Answer · 2016-01-13 08:05:59Z

1

if (isset($_GET['submit'])) {
        $example = $_GET['t'];
$i=0;
$arrayA = array();
        foreach ($example as $value) {
            $arrayA[$i] = ($value);
$i++;

        }
print_r($arrayA);
    }

answered Jan 13, 2016 at 8:05

Charanjeet Singh

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Comments

Abdul Kohar · Accepted Answer · 2016-01-13 07:51:35Z

0

if you do

$array[$i++] ;

it wont work , just try this and it wont replace your old value

$array[$i] = $value;    

    $i++;

answered Jan 13, 2016 at 7:51

Abdul Kohar

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Comments

kjdion84 · Accepted Answer · 2016-01-13 08:55:32Z

0

You must increment your variable first, then use the variable as the array key.

Edit: this is what you're looking for:

$i = 0; 

foreach ($example as $value) {
    $array[$i] = $value;    

    $i++;
}

edited Jan 13, 2016 at 8:55

answered Jan 13, 2016 at 7:37

kjdion84

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3 Comments

Malik Over a year ago

how? is nt like c++?

Victor Radu Over a year ago

actually $i++ does not return true, it returns $i. $i=10; var_dump($i++) will output 10 not true

Malik Over a year ago

same nothing change. If u see my code:- if (isset($_GET['submit'])) { $l++; $example = $_GET['t']; foreach ($example as $value) { $array[$l] = ($value); echo 'l',$l,"$array[$l] <br>"; $l++; } they all are in 1st while loop and as a result i am stuck in scope and thats why i am unable to add values in array, Can u suggest ?

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