Read from file and create associative array? - php

Question

I am able to read from a file and create an array however I get the following error: Notice: Undefined offset: 1. Within my array there is one element that is empty and I don't understand why it is empty.
My text file is in the following format:
#EXTINF:0,ABC family USA[]http://localhost/IpInfo/index.html
#EXTINF:0,CBC[]http://localhost/IpInfo/index1.html
#EXTINF:0,A&E[]http://localhost/IpInfo/index2.html
Here is my code:
$fh = fopen('file1.txt', 'r');
$theData = fread($fh, filesize('file1.txt'));
$arr = array();
$my_array = explode("\r\n", $theData);
foreach($my_array as $line){
$tmp = explode("[]", $line);
$arr[$tmp[0]] = $tmp[1];
}
fclose($fh);
echo '<pre>';
echo print_r($arr);
I'm not quite sure what the problem is? Any help would be much appreciated!
Thanks!

Answer 1

Probably your input data doesn't use \r\n as the line delimiter? I'm not sure whether I got the problem completely. Also you might want to take empty lines into account.
I would use the file() function, which simplifies to iterate over the lines of a file and can handle Windows and Unix line feeds and check for empty lines:
$arr = array();
foreach(file('a.txt') as $line){
// I'm using `trim()` here since $line
// will still contain the newline delimiter
$line = trim($line);
// Skip empty lines
if(empty($line) {
continue;
}
$tmp = explode("[]", $line);
$arr[$tmp[0]] = trim($tmp[1]);
}
echo '<pre>';
print_r($arr);
Output:
<pre>Array
(
[#EXTINF:0,ABC family USA] => http://localhost/IpInfo/index.html
[#EXTINF:0,CBC] => http://localhost/IpInfo/index1.html
[#EXTINF:0,A&E] => http://localhost/IpInfo/index2.html
)

Answer 2

The reason is that the explode function splits your read-in data at the "\r\n". And you have a new line after the last line, and that's what results in the last "array" with no keys or values. To fix this, replace this line : $my_array = explode("\r\n", $theData); with these:
$my_array = explode("\r\n", $theData);
array_pop($my_array);