PHP Find String in CSV file

Question

I\'ve got a large flat file of usernames and emails in the following format:

\"username\", \"email\"
\"username\", \"email\"
\"username\", \"email\"
<         


        

Answer 1

First, just use file() to get the contents of the file into an array:

$file_contents = file( $filename, 'r' );

Now loop through the contents of the array, splitting the strings and examining the email address:

foreach ( $file_contents as $line ) {
    list ( $username, $email ) = str_split( ',' $line );
    if ( trim( $email ) == $string ) {
        // A match was found. Take appropriate action.
    }
}