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Warning: Use of undefined constant fp – assumed 'fp' – PHP Version 7.2.34 – PHP Versions

I have problem witth this warning:

Warning: Use of undefined constant fp - assumed 'fp'

My code is:

<?php
$DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
@ $fp = fopen("$DOCUMENT_ROOT/orders/orders.txt", 'rb');
if (!fp) {
    echo "<p>No orders pending. Please try later.</p>";
    exit;
}
while (!feof($fp)) {
    $order = fgets ($fp, 999);
    echo $order."<br />";
}
?>

I have PHP Version 7.2.34.
Please help me to solve the warning.

Tags:

2

Answers


  1. 0

    You forget to put $ before the fp in if condition.

    if (!$fp) {
    echo "<p>No orders pending. Please try later.</p>";
    exit;
}
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  2. 0

    Forgot $ before fp

    If $ is appended to a string, it is a variable.

    If $ is not appended and we are accessing it, PHP considers it as a CONSTANT and tries to find out where it is defined.

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