PHP

PHP Cheat Sheet

January 19, 2022January 19, 2022 Abdul Mohammad (AMD) 0 Comments

PHP Cheat Sheet

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Arrays array_intersect array_merge array_pop array_push array_reverse array_walk count in_array

Date and Time date mktime strtotime time

^Start of string

$	End of string
.	Any single character
(a\|b)	a or b
(…)	Group section
[abc]	Item in range (a or b or c)
[^abc]	Not in range (not a or b or c)
\s	White space
a?	Zero or one of a
a*	Zero or more of a
a+	One or more of a

Y	4 digit year	2005
y	2 digit year	05
F	Long month	January
M	Short month	Jan
m	Month (leading zeros)	01 to 12
n	Month	1 to 12
D	Short day name	Mon
l	Long day name	Monday
d	Day (leading zeros)	01 to 31
j	Day	1 to 31

Regex ereg eregi ereg_replace eregi_replace split

spliti

preg_match preg_match_all preg_replace preg_split

Sessions session_destroy session_id session_start

Filesystem clearstatcache copy fclose fgets file

filemtime filesize file_exists fopen fread fwrite is_dir is_file readfile

Headers header headers_sent setcookie

Mail

a{3}	Exactly 3 of a
a{3,}	3 or more of a
a{3,6}	Between 3 and 6 of a

\Escape character

[:punct:]	Any punctuation symbol
[:space:]	Any space character
[:blank:]	Space or tab

i	Case-insensitive
s	Period matches newline
m	^ and $ match lines
U	Ungreedy matching
e	Evaluate replacement
x	Pattern over several lines

h	12 Hour (leading zeros)	01 to 12	Strings
g	12 Hour	1 to 12
			addslashes
H	24 Hour (leading zeros)	00 to 23	crypt
G	24 Hour	0 to 23	echo
			explode
i	Minutes (leading zeros)	00 to 59
			implode
s	Seconds (leading zeros)	00 to 59
			md5
			nl2br
w	Day of week 1	0 to 6	sprintf
z	Day of year	0 to 365	strip_tags
			stripslashes
W	Week of year 2	1 to 53
			stristr
t	Days in month	28 to 31	strpos
			strrev
a		am or pm	strstr
			strtolower
A		AM or PM
			strtoupper
B	Swatch Internet Time	000 to 999	str_replace
S	Ordinal Suffix	st, nd, td, th	substr
			trim

mail

Numbers ceil floor

number_format round

Miscellaneous define eval exit

Network

fsockopen

PHP Options ini_get ini_restore ini_set phpinfo

Execution

exec

array_push ( array, element )

in_array ( needle, haystack ) explode ( separator, string )

split ( pattern, string )

preg_split ( pattern, string )

ereg ( pattern, string ) strpos ( haystack, needle )

str_replace ( search, replace, string )

r	Read
r+	Read and write, prepend
w	Write, truncate
w+	Read and write, truncate
a	Write, append
a+	Read and write, append

T	Timezone of machine	GMT
Z	Timezone offset (seconds)
O	Difference to GMT (hours)	+0200
I	Daylight savings	1 or 0
L	Leap year	1 or 0

USeconds since Epoch 3 c ISO 8601 (PHP 5)

r RFC 2822

1.date(“w”): 0 is Sunday, 6 is Saturday.

2.Week that overlaps two years belongs to year that contains most days of that week. Hence week number for 1st January of a given year can return 53rd week if week belongs to previous year. date(“W”, mktime(0, 0, 0, 12, 28, $year)) always gives correct number of weeks in $year.

3.The Epoch was the 1st January 1970.

URLs rawurldecode rawurlencode urldecode urlencode

Variables empty is_array is_int is_null is_numeric is_object isset serialize unserialize

SuperGlobals $_ENV $_GET $_POST $_COOKIE $_SESSION $_SERVER $_FILES $_REQUEST $GLOBALS