<<TableOfContents(2)>>
= PHP =
PHP is a popular general-purpose scripting language that is especially suited to web development.
* http://www.php.net/
== Console hello world ==
{{{#!highlight sh
php php_echo.php
chmod 755 php_echo.php
./php_echo.php
}}}
{{{#!highlight php
#!/usr/bin/php
<?php
echo "Hello world";
?>
}}}
== syslog ==
Generate a system log message
{{{#!highlight php
<?php
// levels LOG_EMERG LOG_ALERT LOG_CRIT LOG_ERR LOG_WARNING LOG_NOTICE LOG_INFO LOG_DEBUG
syslog(LOG_INFO,'Hello here'); // In Slackware by default logs the message to /var/log/messages
?>
}}}
== Log levels and files in operative systems ==
||'''OS''' || '''File'''|| '''Logged levels'''||
||Slack64 14|| /var/log/messages|| INFO||
||Slack64 14|| /var/log/syslog|| WARNING ERR CRIT||
||CentOS 6.4|| /var/log/messages|| INFO WARNING ERR CRIT||
||Ubuntu 12.04 Precise|| /var/log/syslog|| DEBUG INFO WARNING ERR CRIT||
||Debian 7.0 Wheezy|| /var/log/syslog ||DEBUG INFO WARNING ERR CRIT||
== array ==
Create an array
{{{#!highlight php
<?php
$fruits = array (
"fruits" => array("a" => "orange", "b" => "banana", "c" => "apple"),
"numbers" => array(1, 2, 3, 4, 5, 6),
"holes" => array("first", 5 => "second", "third")
);
$foo = array('bar' => 'baz');
echo "Hello {$foo['bar']}!"; // Hello baz!
?>
}}}
== array_push ==
Push one or more elements onto the end of array
{{{#!highlight php
<?php
$array[] = $var; // push $var into $array
$stack = array("orange", "banana");
array_push($stack, "apple", "raspberry");
?>
}}}
== count ==
Count all elements in an array, or something in an object
{{{#!highlight php
<?php
$a[0] = 1;
$a[1] = 3;
$a[2] = 5;
$result = count($a); // $result == 3
}}}
== intval ==
Get the integer value of a variable
{{{#!highlight php
<?php
echo intval(42); // 42
echo intval(4.2); // 4
echo intval('42'); // 42
?>
}}}
== sprintf ==
Return a formatted string
{{{#!highlight php
<?php
echo sprintf('There are %d monkeys in the %s', 5, 'tree');
?>
}}}
== str_replace ==
Replace all occurrences of the search string with the replacement string
{{{#!highlight php
<?php
// Returns <body text='black'>
$bodytag = str_replace("%body%", "black", "<body text='%body%'>");
?>
}}}
== Class ==
{{{#!highlight php
<?php
class SimpleClass
{
// property declaration
public $var = 'a default value';
// method declaration
public function displayVar() {
echo $this->var;
}
}
class Foo
{
public static $my_static = 'foo';
public function staticValue() {
return self::$my_static;
}
}
class Bar extends Foo
{
public function fooStatic() {
return parent::$my_static;
}
}
class Foo {
public static function aStaticMethod() {
// ...
}
}
class MyClass
{
const CONSTANT = 'constant value';
function showConstant() {
echo self::CONSTANT . "\n";
}
}
class MyClass
{
public $public = 'Public';
protected $protected = 'Protected';
private $private = 'Private';
function printHello()
{
echo $this->public;
echo $this->protected;
echo $this->private;
}
}
?>
}}}
== Predefined variables ==
* $GLOBALS
* $_SERVER
* $_GET
* $_POST
* $_COOKIE
* $_FILES
* $_ENV
* $_REQUEST
* $_SESSION
== foreach ==
{{{#!highlight php
<?php
$listx = array(10,11,12);
foreach($listx as $itemx){
print("Itemx: $itemx ");
}
$listassocx = array('ten'=>10,'eleven'=>11,'twelve'=>12);
foreach($listxassocx as $keyx=>$valx){
print("Itemx: $keyx: $valx ");
}
?>
}}}
== explode ==
Split a string by string
{{{#!highlight php
<?php
$p="p1 p2 p3 p4 p5 p6";
$ps = explode(" ", $p);
echo $pieces[0]; // p1
echo $pieces[1]; // p2
echo $pieces[3]; // p4
?>
}}}
== preg_split ==
Split the given string by a regular expression
{{{#!highlight php
<?php
$keywords = preg_split("/[\s,]+/", "hypertext language, programming");
print_r($keywords); // will output the three word
?>
}}}
== file_get_contents ==
Reads entire file into a string
{{{#!highlight php
<?php
$homepage = file_get_contents('http://www.example.com/');
echo $homepage;
$file = file_get_contents('./people.txt', true);
?>
}}}
== DOMDocumentDOMDocument::loadXML ==
Load XML from a string
{{{#!highlight php
<?php
$doc = DOMDOcument::loadXML( file_get_contents( $base . '/sitemap.xml' ) );
$elements = $doc->getElementsByTagName('loc');
?>
}}}
== CORS (cross origin resource sharing) ==
=== read.example.org/index.php ===
{{{#!highlight php
<?php
header("Content-type:application/json");
header("Cache-Control: no-cache");
header("Pragma: no-cache");
header("Access-Control-Allow-Origin: " . $_SERVER['HTTP_ORIGIN'] );
header("Access-Control-Allow-Credentials: true");
session_start();
$user = $_SESSION["user"];
echo("{\"key\":\"readData\" , \"user\": \"" . $user . "\" }");
?>
}}}
=== auth.example.org/index.php ===
{{{#!highlight php
<?php
header("Content-type:application/json");
header("Cache-Control: no-cache");
header("Pragma: no-cache");
header("Access-Control-Allow-Origin: " . $_SERVER['HTTP_ORIGIN']);
header("Access-Control-Allow-Credentials: true");
session_set_cookie_params(0, '/', '.example.org');
session_start();
$_SESSION["user"] = "userx " . time();
echo("{\"key\":\"authData\"}");
?>
}}}
=== app.example.org/index.html ===
{{{#!highlight html
<html>
<head>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<script>
$(document).ready(function(){
console.log('Iooo');
$.ajax({
url: "http://auth.example.org/",
xhrFields: { withCredentials: true },
success: function(data, textStatus,jqXHR ){ $("#auth").text(data.key); },
error: function( jqXHR, textStatus, errorThrown ){console.log(textStatus);}
});
$.ajax({
url: "http://read.example.org/",
xhrFields: {withCredentials: true},
success: function(data,textStatus,jqXHR){ $("#read").text(data.key + ' ' + data.user ); },
error: function( jqXHR, textStatus, errorThrown ){console.log(textStatus);}
});
});
</script>
</head>
<body>
<p id="auth"></p>
<p id="read"></p>
</body>
</html>
}}}
=== vhosts ===
{{{
<VirtualHost *:80>
ServerName app.example.org
DocumentRoot "/var/www/htdocs/app.example.org"
<Directory "/var/www/htdocs/app.example.org">
Require local
AllowOverride All
</Directory>
</VirtualHost>
<VirtualHost *:80>
ServerName auth.example.org
DocumentRoot "/var/www/htdocs/auth.example.org"
<Directory "/var/www/htdocs/auth.example.org">
Require local
AllowOverride All
</Directory>
</VirtualHost>
<VirtualHost *:80>
ServerName read.example.org
DocumentRoot "/var/www/htdocs/read.example.org"
<Directory "/var/www/htdocs/read.example.org">
Require local
AllowOverride All
</Directory>
</VirtualHost>
}}}
== Enable PHP in Slackware64 ==
{{{#!highlight sh
# enable line /etc/httpd/httpd.conf
sed -i 's/#Include \/etc\/httpd\/mod_php.conf/Include \/etc\/httpd\/mod_php.conf/g' httpd.conf
#update mod_php.conf to point to the right path of libphp5.so
LoadModule php5_module /usr/lib64/httpd/modules/libphp5.so
<FilesMatch \.php$>
SetHandler application/x-httpd-php
</FilesMatch>
#restart httpd/apache
sh /etc/rc.d/rc.httpd restart
}}}
=== /var/www/htdocs/teste.php ===
{{{#!highlight php
<?php
phpinfo();
echo "aaa";
?>
}}}
* http://localhost/teste.php
=== /var/www/htdocs/log.php ===
{{{#!highlight php
<?php
// In Slackware by default logs the message to /var/log/messages
syslog(LOG_INFO,$_GET['msg']);
?>
}}}
* http://localhost/log.php?msg=Test%20message%20!!!
== Current date ==
{{{#!highlight php
<?php
//$today = date("Y-m-d H:i:s");
$today = gmdate("Y-m-d H:i:s");
echo php_uname() . " " . $today;
?>
}}}