$_SERVER['HTTP_USER_AGENT'];
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Php get_meta_tags-Extracts all meta tag content attributes
get_meta_tags — Extracts all meta tag content attributes from a file and returns an array
<?php// Assuming the above tags are at www.example.com$tags = get_meta_tags('htt… Read More- 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
- What line should you add to the Apache configuration file to ensure that the .php extension is recognized?
This line ensures that Apache will treat files ending with the .php extension asPHP scripts:AddType application/x-httpd-php .php
… 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
- $_ENV and $_SERVER ?
PHP sets several variables for you containing information about the server, the
environment, and your visitor's request. These are stored in the superglobal
arrays $_ENV and $_SERVER, but their availability depends on
whe… Read More
- What is triggers?
A trigger is a database object which is associated with particular
database table.
Triggers gets called automatically when particular
event(INSERT, UPDATE, DELETE)
occurs on table.
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- What are the differences between mysql_fetch_array(), mysql_fetch_object(), mysql_fetch_row()?
mysql_fetch_array() -> Fetch a result row as a combination of
associative array and regular array.
mysql_fetch_object() -> Fetch a result row as an object.
mysql_fetch_row() -> Fetch a result set as a regular array… 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
- 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
- How to prevent hijacking in PHP?
Make Error_reporting to E_ALL so that all variables will be intialized before using them. Make practice of using htmlentities(), strip_tags(), utf8_decode() and addslashes() for filtering malicious data in php&nb… Read More
- What Is a Session?
It is stored at server side because PHP is server side scripting language
Session is stored on server side
because how much time page will execute it doesn't depend on client it
depends on server. Server decide the sess… 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 $b are equal */ }
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- magic_quotes_gpc, magic_quotes_runtime
Magic quotes is the name of a PHP feature that automatically quotes inputdata, by using the addslashes() function. Historically, this was used so thatform data could be used directly in SQL queries without any security or qu… Read More
- Web server compression?
The best way to understand web server compression is to think of sending ZIP filesinstead of uncompressed files from your web server to your web user. Sending less dataover the network will minimize network latency and your … Read More
- access the values passed to a function?how
Use the names from the function
prototype:
function commercial_sponsorship($letter, $number) {
print "This episode of Sesame Street is brought to you by ";
print "the letter $letter and number $number.\n";
}
com… Read More