PHP Variable Tests

PHP Variable Tests

php version 5.1.6

version for 5.0.4 (as at 26/09/2005)

$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
isset($v)	false	true	true	true	true	true	true	true	true	true
if ($v) {	false	false	false	false	true	true	true	true	true	true
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
isset($v)	true	true	true	true	true	true	true	true	true	false
if ($v) {	true	true	false	true	true	true	true	false	true	false
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
empty($v)	true	true	true	true	false	false	false	false	false
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
empty($v)	false	false	true	false	false	false	false	true	false	true
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
is_scalar($v)	false	true	true	true	true	true	true	true	true	true
is_bool($v)	false	false	true	false	true	false	false	false	false	false
is_string($v)	false	false	false	true	false	false	false	false	true	false
is_int($v)	false	true	false	false	false	true	false	true	false	false
is_numeric($v)	false	true	false	false	false	true	true	true	true	true
is_float($v)	false	false	false	false	false	false	true	false	false	true
is_null($v)	true	false	false	false	false	false	false	false	false	false
is_array($v)	false	false	false	false	false	false	false	false	false	false
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
is_scalar($v)	true	true	true	true	true	true	true	false	false	false
is_bool($v)	false	false	false	false	false	false	false	false	false	false
is_string($v)	true	true	true	true	true	true	true	false	false	false
is_int($v)	false	false	false	false	false	false	false	false	false	false
is_numeric($v)	true	true	true	false	false	false	false	false	false	false
is_float($v)	false	false	false	false	false	false	false	false	false	false
is_null($v)	false	false	false	false	false	false	false	false	false	true
is_array($v)	false	false	false	false	false	false	false	true	true	false
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
ctype_digit($v)	false	false	false	false	false	false	false	false	false	false
ctype_alnum($v)	false	false	false	false	false	false	false	false	false	false
ctype_lower($v)	false	false	false	false	false	false	false	false	false	false
ctype_print($v)	false	false	false	false	false	false	false	false	true	false
ctype_space($v)	false	false	false	false	false	false	false	false	false	false
ctype_cntrl($v)	false	true	false	false	false	true	false	false	false	false
ctype_graph($v)	false	false	false	false	false	false	false	false	true	false
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
ctype_digit($v)	true	false	true	false	false	false	false	false	false	false
ctype_alnum($v)	true	false	true	false	true	true	true	false	false	false
ctype_lower($v)	false	false	false	false	true	false	false	false	false	false
ctype_print($v)	true	true	true	true	true	true	true	false	false	false
ctype_space($v)	false	false	false	true	false	false	false	false	false	false
ctype_cntrl($v)	false	false	false	false	false	false	false	false	false	false
ctype_graph($v)	true	true	true	false	true	true	true	false	false	false
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
count($v)	0	1	1	1	1	1	1	1	1	1
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
count($v)	1	1	1	1	1	1	1	0	1	0
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
gettype($v)	NULL	integer	boolean	string	boolean	integer	double	integer	string	double
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
gettype($v)	NULL	integer	boolean	string	boolean	integer	double	integer	string	double
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
intval($v)	0	0	0	0	1	1	1	-1	-1	-1
floatval($v)	0	0	0	0	1	1	1.3	-1	-1	-1.7
strlen($v) NEW!	0	1	0	0	1	1	3	2	2	4
strval($v)	''	'0'	''	''	'1'	'1'	'1.3'	'-1'	'-1'	'-1.7'
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
intval($v)	1	1	0	0	0	123	0	0	1	0
floatval($v)	1	1.3	0	0	0	123	0	0	1	0
strlen($v) NEW!	1	3	1	1	6	6	6	5	5	0
strval($v)	'1'	'1.3'	'0'	' '	'string'	'123str'	'str123'	'Array'	'Array'	''
$v=	NULL	0	FALSE	""	TRUE	1	1.3	-1	"-1"	-1.7
floor($v)	0	0	0	0	1	1	1	-1	-1	-2
ceil($v)	0	0	0	0	1	1	2	-1	-1	-1
round($v)	0	0	0	0	1	1	1	-1	-1	-2
$v=	"1"	"1.3"	"0"	" "	"string"	"123str"	"str123"	array()	array(1)	unset($v)
floor($v)	1	1	0	0	0	123	0	false	false	0
ceil($v)	1	2	0	0	0	123	0	false	false	0
round($v)	1	1	0	0	0	123	0	false	false	0

---

Accessing Array Key/Values

$arr = array ( 'zero' => 0, 'one' => 1, 'three' => 'Three', 'null' => NULL, 'false' => false, 'empty' => '', );

$key = 'zero' 'one' 'two' 'three' 'null' 'false' 'empty' isset($arr[$key]) true true false true false true true array_key_exists($key,$arr) true true false true true true true if ($arr[$key]) { false true false true false false false   empty($arr[$key]) true false true false true true true   gettype($arr[$key]) integer integer NULL string NULL boolean string

---

In case interested all these tests are carried out live as this page is rendered (with a bit of 'eval'), so any upgrade of PHP will immediately showup. If you have a different version of PHP, and would like to host a copy then let me know at the link below.

Hosted at deformedweb.co.uk. Comments/Suggestions/Donations etc to Barry (c)2005


또 다른 링크 
http://www.blueshoes.org/en/developer/php_cheat_sheet/

element

Font
font-family
font-size
font-style
font-variant
font-weight
letter-spacing
line-height
text-decoration
text-align
text-indent
text-transform
white-space
word-spacing
color
Background
bg-attachment
bg-color
bg-image
bg-position
bg-repeat
Box
width
height
border-top
border-right
border-bottom
border-left
margin
padding
max-height
min-height
max-width
min-width
outline-color
outline-style
outline-width
Positioning
position
top
bottom
right
left
float
display
clear
z-index
List
list-style-image
list-style-type
list-style-position
Table
vertical-align
border-collapse
border-spacing
caption-side
empty-cells
table-layout
Effects
text-shadow
-webkit-box-shadow
border-radius
Other
overflow
cursor
visibility