Unable to access PHP array

Question

I have a file in which I store user information. The filename is johndoe (with no extension):

johndoe

John,Doe,JohnDoe,[email protected],abcd1234

I am trying to get John, Doe and JohnDoe from the file in this way:

index.php

$filename = explode("/", $_SERVER["PHP_SELF"])[2];
$userpath = "http://192.168.0.1/member/" . $filename;
$userfile = fopen($userpath,"r");
$username = explode(",",fgets($userfile))[2];
$firstname = explode(",",fgets($userfile))[0];
$lastname = explode(",",fgets($userfile))[1];

where $_SERVER["PHP_SELF"] currently returns /member/johndoe/index.php.

When I print the array explode(",",fgets($userfile)) using print_r(), I get:

Array ( [0] => John [1] => Doe [2] => JohnDoe [3] => [email protected] [4] => abcd1234 )

However, I can't access any of the array elements. For example, echoing explode(",",fgets($userfile))[2] throws an error:

Notice: Undefined offset: 2 in 192.168.0.1/member/johndoe/index.php on line 8

Why do you read the file multiple times? Read once, store the array resulted by the split in a variable and use it multiple times. fgets will not reset the file, it will try to read the next string. Which will be empty on the second read. — ZorgoZ
– ZorgoZ, Commented Sep 29, 2018 at 20:24
Thank you, I didn't know it will read the next line on calling fgets() multiple times. — Wais Kamal
– Wais Kamal, Commented Sep 29, 2018 at 20:30

Jeto · Accepted Answer · 2018-09-29 20:30:47Z

2

After using fgets, the file pointer will move to the byte right next to the last one it just read.

You don't need to call it every time:

$filename = explode("/", $_SERVER["PHP_SELF"])[2];
$userpath = "http://192.168.0.1/member/" . $filename;
$userfile = fopen($userpath,"r");

// Split into parts and assign values to corresponding variables
list($firstname, $lastname, $username) = explode(',', fgets($userfile));

// Alternative syntax (PHP 7.1+)
// [$firstname, $lastname, $username] = explode(',', fgets($userfile));

edited Sep 29, 2018 at 20:30

answered Sep 29, 2018 at 20:22

Jeto

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