php save string to file

Question

I am trying to save requested string to a text file. If string exist in file, it returns message if not it saves string and return ok message. Below is what I did and its not working. I do not get any file in the current directory.

<?php

$data=$_REQUEST["data"];

function registration($dat)
{
$file = 'data.txt';
if( strpos(file_get_contents($file),$_GET[$dat]) !== false) {
 $current = file_get_contents($file);
 $current .= $dat;
 file_put_contents($file, $current);    
 $result.='Data Added ok!!';
 return $result;
 } else {  
$result.='Data Already Saved';
return $result;
 }
}

echo registration($data);

?>

laurent · Accepted Answer · 2014-05-12 12:47:46Z

1

Try this UPDATED :: add a new line on each save:

    $data=((string)$_REQUEST["data"]);
    echo registration($data);
    function registration($dat,$file = 'data.txt')
    {
    $result='';
    $fileContent=file_get_contents($file);
    if( strpos($fileContent,$dat) === false) {
     $current = $fileContent;
     $current .= "\r\n".$dat;
     file_put_contents($file, $current);    
     $result.='Data Added ok!!';

     } else { 
    $result.='Data Already Saved';

     }
     return $result;
}

edited May 12, 2014 at 12:47

answered May 12, 2014 at 12:24

laurent

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1 Comment

dudey Over a year ago

working (Y) just one quesion how to add linebreak after saving data

vdolez · Accepted Answer · 2014-05-12 12:23:48Z

1

You may have made a mistake. What is $dat ?

$current .= $dat;

Plus I have doubts about the use of !==, why not a simple != ?

answered May 12, 2014 at 12:23

vdolez

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3 Comments

laurent Over a year ago

because strpos may return 0 when it finds the search at the beginning of the string, which would be evaluated to false because /* if(0) { } */ php.net/manual/en/language.operators.comparison.php

vdolez Over a year ago

Ha, yes. I should have read the manual of course. Thanks for upvoting my answer :)

laurent Over a year ago

Don't worry Welcome :)

Marcin Nabiałek · Accepted Answer · 2014-05-12 12:23:14Z

0

You mix here variable with $_GET and $_REQUEST. It should work in your case:

<?php

$data=$_REQUEST["data"];

function registration($data)
{
 $file = 'data.txt';
 $content = file_get_contents($file);

 mb_internal_encoding('UTF-8');
 if( mb_strpos($content, $data) !== false) {

 file_put_contents($file, $content.$data);    
 $result ='Data Added ok!!';
 return $result;
 } else {  
$result ='Data Already Saved';
return $result;
 }
}

echo registration($data);

?>

answered May 12, 2014 at 12:23

Marcin Nabiałek

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Comments

miltos · Accepted Answer · 2014-05-12 12:39:29Z

0

Create an empty file with name data.txt at the same directory, and change permissions of the file to +w and check your if statement.

edited May 12, 2014 at 12:39

answered May 12, 2014 at 12:23

miltos

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