Why is there space between my string after concatenation with PHP form?

Question

This is really bizarre because I checked that the two strings which I have concatenate does not have a space between them in the HTML source code. However, when PHP parse the text in my update.php file, it returns string1 string2 instead of string1string2 which is the expected output.

What went wrong?

Update.php

<?php

    $string1 = $_POST['string1'];
    $string2 = $_POST['string2'];
    $filename = str_replace(" ", "", substr($string1, 14))
        . str_replace(" ", "", substr($string2, 11));


    echo $filename;
?>

$_POST['string1'] = Exchange Name: Osaka;
$_POST['string2'] = Stock Name: 20;

Are you sure the space is a space, and not a tab or newline character? — Michael
– Michael, Commented Dec 31, 2012 at 6:12
@Michael: How may I check whether the space is a space and not a tab or newline character? please advise. — Ting Ping
– Ting Ping, Commented Dec 31, 2012 at 6:17
@TingPing My guess is that you're checking the output in a browser. What you want to do is to view the source code of the output so it's not html-formatted. Pass an array of all possible character to str_replace instead of just space, e.g. str_replace(array(' ', '\n', '\t'), '', $subject); — Michael
– Michael, Commented Dec 31, 2012 at 6:20

Community · Accepted Answer · 2018-04-05 19:45:13Z

3

$string1 = "Exchange Name: Osaka";
$string2 = "Stock Name: 20";
$pattern = '/[\W]/i'; // you can add extra conditions to handle other chars as well
$replacement = "";

echo preg_replace($pattern, $replacement, $string1)
    . preg_replace($pattern, $replacement, $string2);

edited Apr 5, 2018 at 19:45

CommunityBot

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answered Dec 31, 2012 at 6:15

Varun Bajaj

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2 Comments

Ting Ping Over a year ago

Warning: preg_replace() [function.preg-replace]: Unknown modifier '\' in D:\wamp\www\update.php on line 11

Michael Over a year ago

Remove the slash in the middle. Should be $pattern = '/\n\t/i';

AgnosticDev · Accepted Answer · 2012-12-31 06:11:14Z

2

Possibly try using trim instead of replace.

    trim(substr($string1,14));

Hope that helps.

answered Dec 31, 2012 at 6:11

AgnosticDev

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1 Comment

Hanky Panky Over a year ago

trim would remove spaces only from ends, not if they are in any other position

Hanky Panky · Accepted Answer · 2012-12-31 06:27:08Z

1

After populating filename, You can use

$filename = str_replace(" ", "", $filename);

But this is not a proper solution considering we didnt yet figure out where the issue lies, it is just a fix. So first find the issue so you know why it is happening

Then somehow you are getting new line characters from the form which posted these values. Try this

$filename = str_replace("\r", "", $filename);
$filename = str_replace("\n", "", $filename);

edited Dec 31, 2012 at 6:27

answered Dec 31, 2012 at 6:14

Hanky Panky

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5 Comments

Hanky Panky Over a year ago

I just ran your code and it seems to work as you expect it to. You sure its showing a space for you?

Ting Ping Over a year ago

I am running on windows. I am not sure whether that will affect the result?

Hanky Panky Over a year ago

view source of the output, see if shows with a space or a newline? for me your code outputs Osaka20

Ting Ping Over a year ago

The source output shows that the two strings are separated by a new line. Hmm, seems like the 'space' problem is really a newline issue. How may i get rid of that new line?

Hanky Panky Over a year ago

check update. you can consolidate those 2 replaces in one and just replace "\r\n"

Ting Ping · Accepted Answer · 2012-12-31 06:32:32Z

0

I solved it by using the following:

echo str_replace(PHP_EOL, '', $filename);

answered Dec 31, 2012 at 6:32

Ting Ping

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