Php Reference Sheet printable pdf download

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Data Types

Super Globals

integer, float, boolean, string, array, object, resource, NULL

$GLOBALS (Access all global variables in script)

$_SERVER (Access web server variables)

Variable Declarations

$_GET (Values passed to script through URL)

$variablename = <value>;

$_POST (Values passed to script through HTTP Post)

$anothervariable =& $variablename; (Assign by Reference)

$_COOKIE (Values passed by user cookie)

$_FILES (

$_FILES (Values passed by HTTP Post File Uploads)

Declare Array

$_ENV (Values passed to script via the environment)

$arrayname = array();

$_REQUEST (Values passed by URL, HTTP Post, or user Cookies)

$_SESSION (Values passed through user's session)

Initialize Array

$arrayname = array(<value1>, <value2>, <value3>);

If Else

$arrayname = array(<key> => <value>, <key> => <value>); (Define Keys)

if (<condition 1>)

$multiarray = array(<key> => array(<value1>,<value2>)); (Multi-dimensional)

{ <statement 1>; }

elseif (<condition 2>)

Common Array Functions

{ <statement 2>; }

sort(<array>); (Sort array assigns new keys)

else

asort(<array>); (Sort array maintain keys)

{ <statement 3>; }

rsort(<array>); (Sort array in reverse, new keys)

arsort(<array>); (Sort array in reverse, maintain keys)

Inline If (Ternary)

count(<array>); (Count elements)

<condition> ? true : false;

count(<array>,COUNT_RECURSIVE); (Count multidimensional array)

array_push(<array>,<value>); (Push item onto end of array)

For Loop

array_pop(<array>); (Pop item off end of array)

for (<initialize>;<condition>;<update>)

{

Comments

<statements>;

// Comment text

}

/* Multi-line comment text */

# Comment text

For Each Loop

foreach (<array> as [<value> |<key> => <value>])

Arithmetic Operators

{

+ (Addition), - (Subtraction), * (Multiplication), / (Division), % (Modulus)

<statements>;

[break];

Relational Operators

[continue];

== (Equal), === (Equal with type comparison), != (Not equal), <> (Not equal), !== (Not Equal

}

with type comparison), < (Less than), > (Greater than), <= (Less than or equal to), >=

(Greater than or equal to)

While Loop

while (<condition>)

Logical Operators

{

! (logical NOT), && (logical AND), || (logical OR), xor (logical XOR)

<statements>;

}

Assignment Operators

= (Assign), += (Addition), -= (Subtraction), *= (Multiplication), /= (Division), .=

Do-While Loop

(Concatenation), %= (Modulus), &= (And), |= (Or), ^= (Exclusive Or), <<= (Left Shift), >>=

(Right Shift)

{

<statements>;

String Concatenation

} while (<condition>);

. (Period)

Switch

String Manipulation

switch (<expression>)

substr(<string>,<start>,[<length>]);

{

strlen(<string>);

case <literal or type>:

trim(<string>);

<statements>;

ltrim(<string>); // Trim left

[break;]

rtrim(<string>); // Trim right

case <literal or type>:

strtolower(<string>);

<statements>;

strtoupper(<string>);

[break;]

str_replace(<search>,<replace>,<string>,[<count>]);

default:

strpos(<string>, <search>);

<statements>;

strcmp(<string1>,<string2>); (Binary safe string comparison)

}

strcasecmp(<string1>,<string2>); (Binary safe case-insensitive comparison)

explode(<delim>,<string>,[<limit>]); (Break string into array)

Function Structure

implode(<delim>,<array>); (Join array into string separated by delim)

function <function_name>([<parameters>])

{

<statements>;

setcookie (<cookiename>, [<value>],[<expire_time_in_secs_since_epoch>]);

[return <value>;]

$_COOKIE['cookiename']; (Returns value of cookie)

}

Sessions

Class Structure

session_start(); (Create session)

class <class_name> [<extends base_class>]

$_SESSION['key_name'] = value; (Set session variable)

{ {

$variablename = $_SESSION['key_name']; (Retrieve value from session variable)

[var | <modifiers*>] [<class member variables>];

session_destroy(); (Destroy session)

[<modifiers*>] function <function_name>([<parameters>])

{

Error Handling

<statements>;

try {

}

<statements that may cause error>;

}

catch (<Exception Class> $exception_name)

* Modifiers <public | pr ivate | static> are implemented in PHP5

{

<statements to execute when error is caught>;

Declare and Use Class

}

$variable = new class_name();

$variable->function_name();

class_name::function_name(); (Static call)

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Edited By: hotsnoj, Martyr2

Published: October 18, 2007

Php Reference Sheet

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