PHP Cheat Sheet Free Download

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PHP cheat sheet for newbies learning PHP. This PHP cheat sheet is created by DaveChild from cheatography.com.

Free Download: PHP Cheat Sheet

PHP Array Functions 

array_diff (arr1, arr2 ...)
 
array_filter (arr, function)

array_flip (arr)

array_intersect (arr1, arr2 ...)

array_merge (arr1, arr2 ...)

array_pop (arr)

array_push (arr, var1, var2 ...)

array_reverse (arr)

array_search (needle, arr)

array_walk (arr, function)

count (count)

in_array (needle, haystack)

 

PHP String Functions

crypt (str, salt)

explode (sep, str)

implode (glue, arr)

nl2br (str)

sprintf (frmt, args)

strip_tags (str, allowed_tags)

str_replace (search, replace, str)

strpos (str, needle)

strrev (str)

strstr (str, needle)

strtolower (str)

strtoupper (str)

substr (string, start, len)

 

PHP Filesystem Functions

clearstatcache ()

copy (source, dest)

fclose (handle)

fgets (handle, len)

file (file)

filemtime (file)

filesize (file)

file_exist (file)

fopen (file, mode)

fread (handle, len)

fwrite (handle, str)

readfile (file)

 

PHP Date and Time Fucntions

checkdate (month, day, year)

date (format, timestamp)

getdate (timestamp)

mktime (hr, min, sec, month, day, yr)

strftime (formatstring, timestamp)

strtotime (str)

time ()

 

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PHP Regular Expressions Functions

ereg (pattern, str)

split (pattern, str)

ereg_replace (pattern, replace, str)

preg_grep (patter, arr)

preg_match (pattern, str)

preg_match_all (pattern, str, srr)

preg_replace (patter, replace, str)

preg_split (patter, str)

 

Regular Expressions Syntax 

^       Start of string

$       End of string

.       Any single character

(a|b)   a or b

(...)   Group section 

[abc]   In range (a, b or c)

[^abc]  Not in range

s       White space

a?      Zero or one of a

a*      Zero or more of a

a*?     Zero or more, ungreedy

a+      One or more of a

a+?     One or more, ungreedy

a{3}    Exactly 3 of a

a{3,}   3 or more of a

a{,6}   Up to 6 of a

a{3,6}  3 to 6 of a

a{3,6}? 3 to 6 of a, ungreedy


 	
Escape character


[:punct:] Any punctu­ation symbol

[:space:] Any space character

[:blank:] Space or tab

 

Pattern Modifiers

g     Global match

i *   Case-i­nse­nsitive

m *   Multiple lines

s *   Treat string as single line

x *   Allow comments and whitespace in pattern

e *   Evaluate replac­ement

U *   Ungreedy pattern

* PCRE modifier

 

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PHP fopen() modes

r     Read

r+    Read and write, prepend

w     Write, truncate

w+    Read and write, truncate

a     Write, append

a+    Read and write, append

 

PHP Date Formating

Y  4 digit year (2008)

y  2 digit year (08)

F  Long month (January)

M  Short month (Jan)

m  Month ⁴ (01 to 12)

n  Month (1 to 12)

D  Short day name (Mon)

l  Long day name (Monday) (lowercase L)
 
d  Day ⁴ (01 to 31) 

j  Day (1 to 31)  



h  12 Hour ⁴ (01 to 12)

g  12 Hour (1 to 12)

H  24 Hour ⁴ (00 to 23)

G  24 Hour (0 to 23)

i  Minutes ⁴ (00 to 59)

s  Seconds ⁴ (00 to 59)


 
w  Day of week ¹ (0 to 6)

z  Day of year (0 to 365)

W  Week of year ² (1 to 53)

t  Days in month (28 to 31)


 

a  am or pm

A  AM or PM

B  Swatch Internet Time (000 to 999)

S  Ordinal Suffix (st, nd, rd, th)



 

T  Timezone of machine (GMT)

Z  Timezone offset (seconds)

O  GMT offset (hours) (+0200)

I  Daylight saving (1 or 0)

L  Leap year (1 or 0)
 
U  Seconds since Epoch ³

c  ISO 8601 (PHP 5) (2008-­07-­31T­18:­30:­13+­01:00)

r  RFC 2822 (Thu, 31 Jul 2008 18:30:13 +0100)

 

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  • ¹ 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 be 53 if week belongs to previous year. date(“W­”, mktime(0, 0, 0, 12, 8, $year)) always gives correct number of weeks in $year.
  • ³ The Epoch is the 1st January 1970.
  • ⁴ With leading zeroes

Free Download: PHP Cheat Sheet

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