How to get a line in a Text file using cakephp

So I know how to open a file in php is done using

fopen("file.txt", 'r') ;

but i want to get one line in the file and so some string manipulation on it.

such as " Serving this with <0101010> "

I want to find the line that starts with "Serving this" and take the whole line add it to $line

Then i will get remove the <> and add it to $number , and same for <0101010>

names of methods that can be used would 开发者_如何学Cbe just perfect

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Okay, the simple method you probably want to use is:

foreach (file("file.txt") as $line) {

   if (strpos($line, "Serving this with") === 0) {

         print "found";

The file function is easier than fopen/fread, as it returns a list of lines already. And the strpos function simply searches the string and returns the position. It must be checked with === 0 here, because it could also return false.

Instead of printing "found" you want to extract something, so you must again use strpos to find your delimeters < and > and then extract the part with substr:

         $l = strpos($line, "<");   // well, actually needs more logic,
         $r = strpos($line, ">");   // some if tests, if both are true
         $wanthave = substr($line, $l, $r - $l + 1);

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A simpler option I would use are regular expressions. And the regex itself looks simple enough in your case:

preg_match_all('/^Serving this with <(\d+)>/m',
               file_get_contens("file.txt"),
               $matches);
print_r($matches[1]);

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you can also use fgets() read file line by line.

$line = fgets($file_handle);