CODEWITHSUNDEEP
phphtml
ValeriRangelov
ValeriRangelov

Reputation: 633

Can't get values from different fields in PHP

I have a page with two section(forms), first is about number of how many new fields I want to create and second - where are the new fields. So my problem is that I can't get the information from second fields. Here is the code:

echo "<form action='create-table.php' method='post'>";
echo "How much fields you want?: <input type='numer' name='fieldsnum'><br>";
echo "<input type='submit' name='first'>";
echo "</form>";

$fieldsnum = $_POST["fieldsnum"];

echo "<form action='create-table.php' method='post'>";
echo "Table Name: <input type='text' name='table'><br><br>";
$table = $_POST["table"];
echo $table;

while ($a < $fieldsnum){
    echo "Table Field $a: <input type='text' name='$a'><br>";
    $a++;
}

echo "<input type='submit' name='second'>";
echo "</form>";

for($a = 0; $a<$fieldsnum; $a++){
     $info[$a] = $_POST[$a];
}

First loop work correctly, but the second has some problem and it can't get the data. I don't understand PHP and I am sorry if it has a lot of mistakes or bad practices.

Upvotes: 1

Views: 76

Answers (1)

Michael Doye
Michael Doye

Reputation: 8171

There are two things wrong here:

First, you need to set $a = 0; before your while loop, otherwise the first iteration of

while ($a < $fieldsnum){...}

Will output:

<input type="text" name>

So you will get no data from that field.

Secondly, Your for loop fails because $fieldsnum is empty on the second submission.

Try this:

<?php

    $fieldsnum = $_POST["fieldsnum"]; 
    $table = $_POST["table"];

    if (isset($_POST["fieldsnum_keep"])) {

        $fieldsnum = $_POST["fieldsnum_keep"];

        for($a = 0; $a < $fieldsnum; $a++){
         $fieldName = $_POST["feild_$a"];
         echo "Field Name $a : $fieldName <br>";
        }

    }

?>
<form action='create-table.php' method='post'>
    How much fields you want?
    <input type='number' name='fieldsnum'><br>
    Table Name: 
    <input type='text' name='table'><br>

    <?php 
        echo $table . "<br>";
        $a = 0; 
        while ($a < $fieldsnum){ 
          echo "Field Name $a: <input type='text' name='feild_$a'><br>";
          echo "<input type='hidden' name='fieldsnum_keep' value='$fieldsnum'><br>";
          $a++;
        } 
    ?>
    <input type="submit" name="second" value="Submit">
</form>

I have kept the value of $fieldsnum by adding it to a hidden field and then using it later in the for loop. I have also made it only one form, which will by submitted twice, instead of 2 forms.

Upvotes: 1

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