Section 1
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ucwords()
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Date created
Mar 14, 2020
Cards (79)
Section 1
(50 cards)
ucwords()
Converts the first character of each word in a string to uppercase
rtrim()
Strips whitespace from the right side of a string
strnatcmp()
Compares two strings using a "natural order" algorithm (case-sensitive)
ltrim()
Strips whitespace from the left side of a string
strripos()
Finds the position of the last occurrence of a string inside another string (case-insensitive)
trim()
Removes whitespace from both ends of a string
str_ireplace()
Replaces some characters in a string (case-insensitive)
str_replace()
Replaces some characters in a string (case-sensitive) (find, replace, word)
strtolower()
Converts a string to lowercase letters
isset()
determine if a variable is set and is not null
min()
find min value
str_repeat()
Repeats a string a specified number of times (string, number)
strcmp()
Compares two strings (case-sensitive) (string1,string2)
sqrt()
square root function
end()
point to the last element in an array
ucfirst()
Converts the first character of a string to uppercase
HEREDOC
-Write large amounts of text from php, but without the need to constantly escape things. - like multiline double quotes - SYNTAX: <<<MESSAGE MESSAGE;
round()
rounds number
Why tags in PHP file?
Allows PHP to be embedded in all sorts of different documents, as everything outside of a pair of opening and closing tags is ignored by the PHP parser
floor()
round down
strtoupper()
Converts a string to uppercase letters
unset()
remove individual elements from an array
strpos()
- Returns the position of the first occurrence of a string inside another string (case-sensitive) (string, find, offset(optional))
define()
constant declaration, in the form ('variable',value)
strcasecmp()
Compares two strings (case-insensitive)
rand()
generates random numbers
lcfirst()
Make a string's first character lowercase
Variable Naming Rules
- start with letter or underscore - case sensitive - alpha-numeric and underscores only - no spaces - no php reserved words
array_values()
Returns all the values of an array
abs()
get absolute value
max()
find max value
PHP Variables
- start with $ - "loosely typed" variable does not need to be declared before being set - PHP automatically converts to the correct data type
$arrays = array('x','x','x');
array with one statement
ceil()
Returns the value of a number rounded upwards to the nearest integer
str_shuffle()
Randomly shuffles all characters in a string
str_pad()
pad a string to a certain length with another string
empty()
determine whether variable is empty: "" - empty string 0 - 0 as an integer 0.0 - 0 as a float "0" - 0 as a string NULL False array() - empty array
mt_rand()
Returns a random integer using Mersenne Twister algorithm
pow()
exponential expression
number_format()
Formats a number with grouped thousands
NEWDOC
same as heredoc except for single quoted strings
strrev()
Reverses a string
intval() floatval()
converts strings to number
strrpos()
Finds the position of the last occurrence of a string inside another string (case-sensitive)
substr()
- Returns a part of a string (string, start, length)
is_numeric()
used to check whether variable is numeric or not. Returns boolean value
strnatcasecmp()
Compares two strings using a "natural order" algorithm (case-insensitive)
stripos()
Returns the position of the first occurrence of a string inside another string (case-insensitive)
count()
count all elements in an array
strlen()
Returns the length of a string
Section 2
(29 cards)