表格过帐数据错误

Question

I have created a short form which is supposed to take data from three text areas, and combine them. It seems that the output of my data is "0". Any ideas why this much be so? Thanks in advance for the help.

<?php
function get_text() {
    $text = trim($_POST['one']);
    $textAr = explode("\n", $text);
    $textAr = array_filter($textAr, 'trim');

    $text2 = trim($_POST['two']);
    $textAr2 = explode("\n", $text2);
    $textAr2 = array_filter($textAr2, 'trim');

    $text3 = trim($_POST['three']);
    $textAr3 = explode("\n", $text3);
    $textAr3 = array_filter($textAr3, 'trim');

    return array($textAr, $textAr2, $textAr3);
}
?>

<form name="merge" method="POST">
    <textarea name="one" rows="10" cols="20"></textarea>
    <textarea name="two" rows="10" cols="20"></textarea>
    <textarea name="three" rows="10" cols="20"></textarea>
    <br /><input type="submit" name="done" value="Merge" /><br /><br />
    <textarea name="result" rows="10" cols="60">
    <?php 
    if(isset($_POST['done'])) {
        list($textAr, $textAr2, $textAr3) = get_text();
        for ($i=0; $i < count($textAr); $i++)
            for ($j=0; $j < count($textAr2); $j++)
                for ($k=0; $k < count($textAr3); $k++)
                    echo($textAr[$i] + $textAr2[$j] + $textAr3[$k]);
    }
    ?></textarea>
</form>

Answer 1

use . (dot) to concat a strings in php try change

echo($textAr[$i] + $textAr2[$j] + $textAr3[$k]);

to

echo $textAr[$i].$textAr2[$j].$textAr3[$k];

Answer 2

Your output is correct as i have tried your code in my local xamp server and it is working perfectly it merges the three values correctly. you can check out the screenshot below

The problem might be with your server , restarting might help you. Or try it with new browser other than the one you are using.