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This code will create an object called $date where methods could be called as per the example below:

$date = new DateTime($date_variable);
echo $date->format('D');
echo $date->format('d');
echo $date->format('M');
echo $date->format('y');


The next short example, shows how could be possible to remove some characters from a string without hassle.

$var = "The Quick Brown Fox";
$var = substr($var,0,-4);
#now $var = "The Quick Brown";

#to remove JUST the last character use this:
$var = "The Quick Brown Fox";
$var = substr($var, 0, -1);
#now $var = "The Quick Brown Fo";

#to remove JUST the first character use this:
$var = "The Quick Brown Fox";
$var = substr($var, 1);
#now $var = "he Quick Brown Fox";


The example above could be amended as per Your taste.

Debug features can be activated in a way to display all errors and warnings to the browser:

// Report all PHP errors
ini_set('error_reporting', E_ALL);

// Set the display_errors directive to On
ini_set(‘display_errors’, 1);

Or it could be useful not to be aware of the 100% of warnings and display just the relevant ones:
// Report simple running errors
ini_set(‘error_reporting’, E_ALL ^ E_NOTICE);

// Set the display_errors directive to Off
ini_set(‘display_errors’, 0);

// Log errors to the web server’s error log
ini_set(‘log_errors’, 1);
A further [and smarter] use of these errors is stacking them onto a log file or an email.
// Destinations
define(“ADMIN_EMAIL”, “nobody@stanford.edu”);
define(“LOG_FILE”, “/my/home/errors.log”);

// Destination types
define(“DEST_EMAIL”, “1″);
define(“DEST_LOGFILE”, “3″);

/* Examples */

// Send an e-mail to the administrator
error_log(“Fix me!”, DEST_EMAIL, ADMIN_EMAIL);

// Write the error to our log file
error_log(“Error”, DEST_LOGFILE, LOG_FILE);
A very very good example of this is as per following:
// Destinations
define(“ADMIN_EMAIL”, “email@domain.com”);
// ***** please note that the log file must be stored into a place that has write permission
// ***** and so, a good way to gather information re where to store this file is:
// ***** create a folder, assign permission as per CHMOD 0777, fill in the following Definition using a physical address
define(“LOG_FILE”, “/my/home/errors.log”);
// Destination types
define(“DEST_EMAIL”, “1″);
define(“DEST_LOGFILE”, “3″);

# Parameters:
# $errno: Error level
# $errstr: Error message
# $errfile: File in which the error was raised
# $errline: Line at which the error occurred

function my_error_handler($errno, $errstr, $errfile, $errline){
switch ($errno) {
case E_USER_ERROR:
// Send an e-mail to the administrator
error_log(“Error: $errstr \n Fatal error on line $errline in file $errfile \n”, DEST_EMAIL, ADMIN_EMAIL);

// Write the error to our log file
error_log(“Error: $errstr \n Fatal error on line $errline in file $errfile \n”, DEST_LOGFILE, LOG_FILE);
break;

case E_USER_WARNING:
// Write the error to our log file
error_log(“Warning: $errstr \n in $errfile on line $errline \n”, DEST_LOGFILE, LOG_FILE);
break;

case E_USER_NOTICE:
// Write the error to our log file
error_log(“Notice: $errstr \n in $errfile on line $errline \n”, DEST_LOGFILE, LOG_FILE);
break;

default:
// Write the error to our log file
error_log(“Unknown error [#$errno]: $errstr \n in $errfile on line $errline \n”, DEST_LOGFILE, LOG_FILE);
break;
}

// Don’t execute PHP’s internal error handler
return TRUE;
}

// Use set_error_handler() to tell PHP to use our method
$old_error_handler = set_error_handler(“my_error_handler”);

This could help a lot to determine what’s what on your website!

[courtesy of http://www.stanford.edu]