CODEWITHSUNDEEP
phpfile
Justin
Justin

Reputation: 45410

Search a file in PHP for a string and return the next line

I have a file I am reading in with php:

$lines = file("input.txt");

I need to search $lines for the string --><-- then return the very next full line. What is the best way to do this?

Thanks.

Upvotes: 0

Views: 122

Answers (2)

AbsoluteƵER&#216;
AbsoluteƵER&#216;

Reputation: 7880

I wasn't sure if you were matching a Windows or a Unix file (hence the \r?), but you can do it with Regular Expressions much more cleanly. You can capture it like this:

$lines = file("input.txt");
preg_match('!(--><--\r?\n)([^\r\n]+)\r?\n!s',$lines,$matches);
$myLine = $matches[2];
echo $myLine;

Upvotes: 0

user20232359723568423357842364
user20232359723568423357842364

Reputation: 4634

You should loop through the array $lines and increment the key by 1 to get the next line.

$lines = file("input.txt");

$return = array();
foreach($lines as $key => $line) {
    if(false !== strpos($line,'--><--')) {
        // check if there is another line in the file
        if(isset($lines[($key+1)])) {
            // add the line to array
            $return[] = $lines[($key+1)];
        }
    }
}
print_r($return);

Upvotes: 1

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