Btukfyl

i get data with cURL from a database and save it in a variable ($alter).

Next, a text file is read. This is done with a loop a certain number of times. Thereby a line is read from a textfile and written to the variable "$linex". The variable "$linex" should then be compared with the variable "$alter. Then the comparison with the second line takes place and so on.

But unfortunately it doesn't work as described. A "false" is always output for every line, even if the string has to match.

Where is the error in the code?

<?php

header('Content-type: text/html; charset=utf-8');

$User_Agent = 'Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0';



$id = $_POST["id"];

$id2 = $_POST["klass"]; 

$id3 = $_POST["element"];                   



$url2 = "https://bpk.bs.picturemaxx.com/api/v1/editing/classifications/$id2/elements";



$request_headers = ;

$request_headers = 'Accept: application/json';

$request_headers = 'charset=utf-8';

$request_headers = 'Content-Type: application/json; charset=utf-8';

$request_headers = 'Accept-Encoding:  gzip, deflate, identity';

$request_headers = 'Accept-Language: de,en-US;q=0.7,en;q=0.3';

$request_headers = 'X-picturemaxx-api-key: key';

$request_headers = 'Authorization: Bearer key';



$ch = curl_init($url2);

curl_setopt($ch, CURLOPT_USERAGENT, $User_Agent);

curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_ENCODING, "");



$result = curl_exec($ch);

$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

curl_close($ch);



$data = json_decode($result, true);



$alternativnameze = array(); 

foreach($data['items'] as $alternativ) {

    $alternativname = $alternativ['localized'];

    $alternativnamez = $alternativname['de-de'];

    $alternativnameze = $alternativnamez['classification_element_name'];

}



$alter = substr(implode($alternativnameze),0 ,1000000);



$file = 'name_test.txt';

$fh = fopen($file, 'r');



if ($fh === false) {

    die('Could not open file: '.$file);

}

for ($i = 0; $i < 6; $i++) {



    $linex = fgets($fh);



    if (strpos($alter, $linex) !== false) {

        echo 'true<br />';

    } else {

        echo 'false<br />';

    }   

}



if (fclose($fh) === false) {

    die('Could not close file: '.$file);

}

?>

Outoput example for variable "$alter"

C. S. Lewis, [29.11.1898 - 22.11.1963], (Clive Staples-Lewis ; Clive
Staples Lewis ; C. S. Luis ; C. Hamilton ; C. S. Ruisu ; Klajv S.
Lʹjuis ; Klaĭv S. Lʹi︠u︡is ; Clive S. Lewis ; Clive Staples Lewis ;
Jack Lewis ; C.S. Luis ; N.W. Clerk ; C.S. Lewis)

Output example for variable "$linex" which should be compared as a substring with the whole string "$alter"

C. S. Lewis, [29.11.1898 - 22.11.1963]

Many thanks in advance for all hints and solution suggestions.

Try $linex = rtrim($linex, "rn"); prior to the comparison to handle extra line-ending characters which are likely in your file.

fgets returns a line from the file with the new line chararcter. So if a line in your text file is just an a, fgets($fh); will return an (in Linux, different character on other OS). strpos("a b c", "an") will always returns false.

A trim should do the trick:

$linex = trim(fgets($fh));