Web developers notes,programming tutorials.

Syntax:

string str_pad ( string input, int pad_length [, string pad_string [, int pad_type]])

str_pad function is used to pad a string to specific length with another string.

Example:

<?php

$username = “sampleuser”;

echo str_pad($username,18,’*',STR_PAD_BOTH);

?>

In above example, First parameter $username is input string. Second parameter 18 is pad length. Third parameter * is the pad string which is optional. Default pad string is space. Fourth parameter STR_PAD_BOTH is pad type which will pad string on both sides. Default pad type is STR_PAD_RIGHT.

- The best way to create the temporary file is with the tmpfile()
function. This function creates a temporary file with a unique random name and opens this for writing.
- And also temporary file will be closed while we use fclose() function.

Example
$fp = tmpfile();
$data = “Test test test test”;
fwrite($fp, $data);
fclose(fp);

There is a code to get user input on ‘*nix’, now there is a code to do the same on Windows based system. Put this code in a file, for example input.php and run it with ‘php -f input.php’

<?php

function read() {
$fp=fopen(”con”, “rb”);
$input=fgets($fp, 255);
fclose($fp);
return str_replace(”rn”, “”, $input);

}

echo(”Whats your name? “);
$name = read();
echo(”Hello $name!n”);

?>