Explode function in PHP

Question

Hello,

I have the following notepad file;

dbName:              

tableName:       

numberOfFields:

I am trying to write a php app which assigns the value of dbName to $dbName, tableName to $tableName and numberOfFields to $numFields.

My code is:

$handle = @fopen("config.txt", "r");
if ($handle) {
    while (!feof($handle)) {
        $buffer = fgets($handle, 4096);
        list($dbName, $tableName, $numFields) = explode(":", "$buffer");
    }
    fclose($handle);
}

however, ":" doesn't work as there are line breaks in between dbName and table Name. How do I explode $buffer, keeping the line breaks in the notepad file?

Thank you.

Answer 1

You can use the chr($INT); function to look for the line break in your explode call.

Your can find more on the chr function here:

http://php.net/manual/en/function.chr.php

Add you can find the ascii chars for line break at:

http://www.asciitable.com/

Answer 2

Have a look at the file function. It takes care of opening and reading the file, and returns an array of lines from the file. You could then iterate through the array and operate on each line individually.

http://us.php.net/manual/en/function.file.php

Answer 3

fgets returns only one line. There is no way $buffer would ever have all three items at once, so that assignment to list() is wrong. For the first line, explode() will return an array with two items: "dbName" (text before the colon) and "" (text after the colon).

Answer 4

Does this work:

list ($dbName, $tableName, $numFields) = explode (':', implode ('', file ('config.txt')));

Answer 5

you can do this:

$data=file_get_contents("file");
$s  = preg_split("/\n\n+/m", $data);
print_r($s);

Answer 6

If you're sure of the line contents, and the file will not grow arbitrarily large:

  1 <?php
  2 
  3 $handle = @fopen("config.txt", "r");
  4 if ($handle) {
  5     $buffer = "";
  6     while (!feof($handle)) {
  7         $buffer = $buffer . trim(fgets($handle, 4096));
  8     }
  9     fclose($handle);
 10 
 11     list($dbName, $tableName, $numFields) = explode(":", $buffer);
 12 }
 13 
 14 ?>

The while loop will go through all the lines and concatenate onto the same buffer after removing whitespace. This leaves just the content separated by ":". This is now amenable to explode.

As Nicolas wrote, feof gets one line at a time, so the list assignment needs to happen outside the loop.