php code to read from text file and compare the user input with the content

Question

i have a php code that read from text file an compare the user input with its content.

the problem is that the system read from the text file but doesn't compare

what is the error and is their another method?

testfile.txt

test admin people bob321 danyjd ajb

code:

<?php

if(isset($_POST["Search"]))
{
    $data= file('testfile.txt');
    $accessData = array();
    foreach($data as $line){
        list($dataFile1) = explode(',', $line);

    }

    $dataInput = isset($_POST['name'])? $_POST['name']:'';

    if(array_key_exists($dataInput, $accessData)){
        echo "text exist";
    }
    else{
        echo "text doesn't exist";
    }
}
?>
<html>
    <head>

    </head>
    <body>
     <form action="test2.php" method="post">
          <p>enter your string <input type ="text"  id = "idName"  name="name" /></p>
          <p><input type ="Submit" name="Search" /></p>
    </form>
    </body>
</html>

@chade_ i don't think so be cause the $dataFile1 is the variable that handle the compared string — Dany 7elo
– Dany 7elo, Commented Nov 24, 2017 at 9:53
Shouldn't it be $accessData[] instead of list($dataFile1)? Using list here feels redundent — IsThisJavascript
– IsThisJavascript, Commented Nov 24, 2017 at 9:53

Lawrence Cherone · Accepted Answer · 2017-11-24 10:17:25Z

2

You can do it like this, using array_search(), reducing the check to 1 line :/

<?php
if (isset($_POST["Search"]) && !empty($_POST['name']))
{
    if (array_search($_POST['name'], file('testfile.txt')) !== false){
        echo "text exist";
    }
    else{
        echo "text doesn't exist";
    }
}

answered Nov 24, 2017 at 10:17

Lawrence Cherone

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