PHP Common functions

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Setcookie (name,value,expire,path,domain,secure): function sends an HTTP cookie to the client.

Domain: Optional, specify the name of the cookie

Secure: Optional rules whether to transfer cookies via secure HTTPS links

Setrawcookie (name,value,expire,path,secure): The function does not URL-encode the cookie, sending an HTTP cookie, as is the case with Setcookie.

Mail (to, subject, message,headers,parameters): function allows e-mail to be sent directly from the script

ABS: The function returns the absolute value of a number

ACOs (ARG): function returns the inverse cosine of a number, x between 1 and 1;

Acosh (x): Returns the inverse hyperbolic cosine of a number

ASIN (x) returns a number of the inverse of the chord

Asinh (): function returns the inverse hyperbolic sine of a number

Atan (ARG): function returns the inverse tangent of a number, the return value between-PI/2 and PI/2

Atan2 (y, x): function returns the inverse tangent of two parameters, the return value between-pi and pi

Atanh (ARG): function returns inverse hyperbolic tangent of an angle

Base_convert (number, frombase, tobase): functions are converted between arbitrary binaries

eg $oct = "0031";

$dec = Base_convert ($oct, 8,10);

echo "octal $oct equals the decimal $dec. ";

Bindec (binary_string): Converting binary to 10 binary

Ceil (value): function rounded up to the nearest integer

Cos (ARG): function returns the cosine of a number

Cosh (ARG): function returns the hyperbolic cosine of a number

Decbin (number): The function converts decimal to binary

Dechex (number): function converts decimal to 16 binary

DECOCT (number): function converts decimal into octal

Deg2rad (number): function converts angle to radians

Exp (ARG): function calculates the exponent of E

EXPM1 (ARG): The function returns exp (x)-1, which is equivalent to the value of X close to 0 to calculate the exact result.

Floor (Value): function is rounded down to the nearest integer

Fmod (x, y): function returns the floating-point number of division

Getrandmax (): function shows the maximum possible value of a random number

Hexdec (hex_string): function converts 16 binary to decimal

Hypot (x, y); function calculates the length of a triangular hypotenuse

Is_finite (val): function to determine whether it is a finite value

Is_infinite (val): Determines whether it is an infinite value

Is_nan (val): Determines whether a non-numeric

Log (X,base): Returns base x logarithm if base is specified, otherwise fan Hu natural logarithm

LOG10 (ARG): Returns the base 10 logarithm

LOG1P (number), returns log (1+X), even when the value of x is close to 0 o'clock to calculate the exact result

Max (x, y): Returns the largest of the parameters, can make multiple values, or it can be an array

Note: PHP treats non-numeric strings as 0, but if this is the maximum value, it will still return a string. If more than one parameter evaluates to 0 and is the maximum, max () returns 0 of the value, and if there is no value of 0 in the argument, the string that is the largest in alphabetical order is returned.

Min (x, y): Returns the minimum value in the parameter, as follows

Mt_rand (Min,max): Returns a random integer using the Mersenne twister algorithm

Octdec (octal_string): convert octal to 10 decimal

PI (): Returns the value of pi

POW (base, exp), returns the value of the exp sub-square of base

Rad2deg (number): Converts radians to angles

Rand (MIN,MAX): function returns random integer

Round (X,pec): function rounds floating-point numbers, x specifies the number to round, PREC, and optionally specifies the number of digits after the decimal point

Can make 0 (default) or negative

Sin (x): function returns the sine of a number

Sinh (ARG): function returns the inverse hyperbolic sine of a number

sqrt (ARG): function returns the square root of a number

Tan (ARG): Tangent

Tanh (ARG): Hyperbolic tangent

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