php

The example below shows how to execute a shell command from within php script.

The command pwd executes the current working directory.

<?php
$output = shell_exec('pwd');
echo "<pre>$output</pre>";
?>

Drupal notes

• If placed within a drupal node it will always display the base location of the drupal installation.
• If you require to call a program which resides above the drupal directory the following may be used.

  <?
  include("../../legacy/program.php");
  ?>

<?
function spammy_user ($op, &$edit, &$account, $category = NULL) {

    if($op=="login") {
        $to = "webmaster@zerotouch.com";
        $subject = "User Login!" . $op;
        
        ob_start();
        print_r($account);
        $mike = ob_get_clean();         

        $body = "Hi,\n\nYou've logged in!";
        $body .= $mike;
        mail($to, $subject, $body);
        
    } elseif ($op=="logout") {
        $to = "webmaster@zerotouch.com";
        $subject = "User Logout!" .

$variable = condition ? if true : if false

An example is shown below:

  $style = isset($_GET['style']) ? $_GET['style'] : 'default';

This checks whether variable $_GET['style'] is set. If it is variable $style is given this value. Alternatively, variable $style is given the value 'default'.

If you have an array in ascending order and you require it to be in descending order you can use the array_reverse function as below.

  $terms = array_reverse($terms);

The code below shows how to iterate through an array and print the keys and values held within an array.

while (list($key, $val) = each($items)) {
  print $key . " -> " . $val;
}

To allocate within a new array simply:

while (list($key, $val) = each($items)) {
  $terms[] = $val . ") " . $key;
}