arsort()
sort()
natsort()
Related Posts:
how execute different code depending on the number and type of arguments passed to a method?
PHP doesn't support method polymorphism as a built-in feature.
However, you can emulate it using various type-checking functions. The following
combine( ) function uses is_numeric(),
is_string(), is_array(), and is_bool(… Read More- how access a method in the parent class that's been overridden in the child?
Prefix parent:: to the method
name:
class shape {
function draw( ) {
// write to screen
}
}
class circle extends shape {
function draw($origin, $radius) {
// validate data
if ($radius > … Read More
- want to link two objects, so when you update one, you also update the other?
Use =& to assign one object to another by
reference:
$adam = new user;
$dave =& $adam;
… Read More
- how create a new instance of an object?
Define the class, then use new
to create an instance of the class:
class user {
function load_info($username) {
// load profile from database
}
}
$user = new user;
$user->load_info($_REQUEST['username'… Read More
- How to check whether two floating-point numbers are equal?
Use a small delta value, and check if the numbers are equal
within that delta:
$delta = 0.00001;
$a = 1.00000001;
$b = 1.00000000;
if (abs($a - $b) < $delta) { /* $a and $b are equal */ }
… Read More
- how associate multiple elements with a single key?
Store the multiple elements in an array:
$fruits = array('red' => array('strawberry','apple'),
'yellow' => array('banana'));
Or, use an object:
while ($obj = mysql_fetch_object($r)) {
$fruits[ ] =… Read More
- how eliminate an object?
Objects are automatically destroyed when a script terminates.
To force the destruction of an
object, use unset( ):
$car = new car; // buy new car
...
unset($car); // car wreck
… Read More
- Php get_meta_tags-Extracts all meta tag content attributes
get_meta_tags — Extracts all meta tag content attributes from a file and returns an array
<?php// Assuming the above tags are at www.example.com$tags = get_meta_tags('htt… Read More
- exchange the values in two variables without using additional variables for storage?
To swap $a and $b:
list($a,$b) = array($b,$a);
… Read More
- PHP Redirect - Redirect Script?
PHP Redirect Function
header('Location: destination.php');
exit();
ou need the Location: part so the browser knows what header it's
receiving. Also, don't forget to
do an exit() or die() right after… Read More
- access the values passed to a function?how
Use the names from the function
prototype:
function commercial_sponsorship($letter, $number) {
print "This episode of Sesame Street is brought to you by ";
print "the letter $letter and number $number.\n";
}
com… Read More
- Control Structures
if
else
elseif/else if
Alternative syntax for control structures
while
do-while
for
foreach
break
continue
switch
declare
return
require
include
require_ once
include_ once
goto
… Read More
- What is MVC?
MVC- Model, View, Controller - is simply
Model - contains data access code and all of you business logic code.
View - Contains markup/design code, generally html,xml, json.
Controller - contains very little… Read More
- You want to extract part of a string, starting at a particular place in the string
Use substr( ) to select your
substrings:
$substring = substr($string,$start,$length);
$username = substr($_REQUEST['username'],0,8);
… Read More
- Scope Resolution Operator?
:: is the scope operator it is used to call methods of a class that has not been instantiated.
… Read More