integer, float, boolean, string, array, object, resource, NULL
$variablename =
<value>; //type defined by type of
<value>
$anothervariable =&
$variablename; //Assign by Reference
$arrayname =
array();
$arrayname =
array(<value1> [,
<value2>, ...]);
//Initialized
$arrayname = array(<key>
=> <value> [, <key>
=> <value>, ...]); //Define
Keys
$multiarray = array(<key>
=> array(<value1> [,
<value2>]) [, <key> =>
...]); //Multi-dimensional
array_push(<array>,<value>);
//Push item onto end of
array
array_pop(<array>); //Pop item off end
of
array
[a][r]sort(<array>); //Sort
array, "a" assigns new keys, "r"
reverses
count(<array>[,COUNT_RECURSIVE]);
//Count elements, use COUNT_RECURSIVE for multidimensional array
// Comment text
/* Multi-line comment text */
# Comment text
Arithmetic: + (Addition), - (Subtraction), * (Multiplication), / (Division), % (Modulus)
Relational: == (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), str[case]cmp(<string1>,<string2>); (Binary safe string comparison, insert "case" for case-insensitive)
Logical: ! (logical NOT), && (logical AND), || (logical OR), xor (logical XOR)
Assignment: = (Assign), += (Addition), -= (Subtraction), *= (Multiplication), /= (Division), .= (Append), . (Concatenation), %= (Modulus), &= (And), |= (Or), ^= (Exclusive Or), <<= (Left Shift), >>= (Right Shift)
<string> . <string> //Concatenation;
seperate strings with
period)
substr(<string>,
<start>[,
<length>]); // Returns the part of <string>
starting at <start> for <length>
characters.
strlen(<string>); // Return length of
string
str_replace(<search>,<replace>,<string>[,<count>]);
// substitue <count> (default: all) occurances of <search> with
<replace> in
<string>
strpos(<string>,
<search>); //Find <search> in
<string>, return
index.
[l|r]trim(<string>); //
Trim spaces; add "l" to trim only left, "r" to trim only
right.
strto[lower|upper](<string>);
// Convert string to all upper or lower
case
str[case]cmp(<string1>,<string2>);
//Binary safe string comparison, insert "case" for
case-insensitive
explode(<delim>,<string>,[<limit>]);
//Split <string> into array of up to <limit> elements as delimited
by
<delim>
implode(<delim>,<array>);
//Join <array> into string separated by <delim>
if (<condition>) {
<statements>; } elseif
(<condition>) {
<statements>; } else {
<statements>;
}
<condition> ? <truevalue> :
<falsevalue>;
for (<init
stmt>;<condition>;<update
stmt>) {
<statements>;
}
foreach (<array> as
[<value> | <key> =>
<value>]) { <statements>;
[break;] [continue;]
}
while (<condition>) {
<statements>; }
do { <statements>; } while
(<condition>);
switch (<expression>) { case <literal or
type>: <statements>; [break;]
[case...] default: <statements>;
}
function
<function_name>([<parameters>])
{ <statements>;
[return
<value>;]
}
class <class_name> [extends
<base_class>] {
[var [<modifiers>] <class member
variables>;] // Modifiers [public |
private | static] are implemented in
PHP5
function
<class_name>([<constructor_parameters>])
{ <statements>; }
// a class function with a name equal to the class is a constructor
for the class and will be called at the point that a new object is
instantiated.
function
<class_function_name>([<parameters>])
{ <statements>;
}
}
$object = new
class_name([<constructor_parameters>]);
$object->class_function_name([<parameters>]);
class_name::class_function_name([<parameters>]);
//Static
call
$object->class_var //Reference a
variable inside a class object. Note there is no $ in front of class_var.
//In PHP5, private class vars can not be accessed.
try { <statements that may cause error>; } catch (<Exception Class> $exception_name) { <statements to execute when error is caught>; }
setcookie (<cookiename>, [<value>],[<expire_time_in_secs_since_epoch>]);
$_COOKIE['cookiename']; (Returns value of cookie)
session_start(); (Create session)
$_SESSION['key_name'] = value; (Set session variable)
$variablename = $_SESSION['key_name']; (Retrieve value from session variable)
session_destroy(); (Destroy session)
$GLOBALS (Access all global variables in script)
$_SERVER (Access web server variables)
$_GET (Values passed to script through URL)
$_POST (Values passed to script through HTTP Post)
$_COOKIE (Values passed by user cookie)
$_FILES (Values passed by HTTP Post File Uploads)
$_ENV (Values passed to script via the environment)
$_REQUEST (Values passed by URL, HTTP Post, or user Cookies)
$_SESSION (Values passed through user's session)
See also:
file: /Techref/language/php/index.htm, 8KB, , updated: 2013/7/23 09:41, local time: 2024/11/8 15:28,
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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