What is gmp php extension?

GNU Multiple Precision

• Introduction
• Installing/Configuring
  • Requirements
  • Installation
  • Runtime Configuration
• Predefined Constants
• Examples
• GMP Functions
  • gmp_abs — Absolute value
  • gmp_add — Add numbers
  • gmp_and — Bitwise AND
  • gmp_binomial — Calculates binomial coefficient
  • gmp_clrbit — Clear bit
  • gmp_cmp — Compare numbers
  • gmp_com — Calculates one's complement
  • gmp_div_q — Divide numbers
  • gmp_div_qr — Divide numbers and get quotient and remainder
  • gmp_div_r — Remainder of the division of numbers
  • gmp_div — Alias of gmp_div_q
  • gmp_divexact — Exact division of numbers
  • gmp_export — Export to a binary string
  • gmp_fact — Factorial
  • gmp_gcd — Calculate GCD
  • gmp_gcdext — Calculate GCD and multipliers
  • gmp_hamdist — Hamming distance
  • gmp_import — Import from a binary string
  • gmp_init — Create GMP number
  • gmp_intval — Convert GMP number to integer
  • gmp_invert — Inverse by modulo
  • gmp_jacobi — Jacobi symbol
  • gmp_kronecker — Kronecker symbol
  • gmp_lcm — Calculate LCM
  • gmp_legendre — Legendre symbol
  • gmp_mod — Modulo operation
  • gmp_mul — Multiply numbers
  • gmp_neg — Negate number
  • gmp_nextprime — Find next prime number
  • gmp_or — Bitwise OR
  • gmp_perfect_power — Perfect power check
  • gmp_perfect_square — Perfect square check
  • gmp_popcount — Population count
  • gmp_pow — Raise number into power
  • gmp_powm — Raise number into power with modulo
  • gmp_prob_prime — Check if number is "probably prime"
  • gmp_random_bits — Random number
  • gmp_random_range — Random number
  • gmp_random_seed — Sets the RNG seed
  • gmp_random — Random number
  • gmp_root — Take the integer part of nth root
  • gmp_rootrem — Take the integer part and remainder of nth root
  • gmp_scan0 — Scan for 0
  • gmp_scan1 — Scan for 1
  • gmp_setbit — Set bit
  • gmp_sign — Sign of number
  • gmp_sqrt — Calculate square root
  • gmp_sqrtrem — Square root with remainder
  • gmp_strval — Convert GMP number to string
  • gmp_sub — Subtract numbers
  • gmp_testbit — Tests if a bit is set
  • gmp_xor — Bitwise XOR
• GMP — The GMP class
  • GMP::__serialize — Serializes the GMP object
  • GMP::__unserialize — Deserializes the data parameter into a GMP object

Anonymous ¶

10 years ago

Be careful with GMP - it considers leading zeros in a number string as meaning the number is in octal, whereas 'bc' doesn't:

  gmp_strval("000100", 10) => 64

  bcmul("000100", "1") => 100

In order to have these functions available, PHP must be compiled with GMP support by using the --with-gmp option.

arancaytar dot ilyaran at gmail dot com ¶

13 years ago

Note that this parameter requires a path, as in --with-gmp=DIR, if gmp is installed in a non-standard location, which is almost always the case when you are building your own PHP installation in your home directory.

Obvious, but it's an easy mistake.

Elydreams Trend ¶

11 months ago

On Debian platforms, make sure you install the gmp development library first:

    sudo apt-get install libgmp-dev

Just like other extensions, you need the libs installed before php compile will gracefully complete all.

omagaldadze at yahoo dot com ¶

9 years ago

On ArchLinux php 5.4.14-1 I had to uncomment the line

extension=gmp.so

in /etc/php/php.ini file.

Probably, restart of web server (e.g. Apache) is required if working from web.

oharry0535 at gmail dot com ¶

3 years ago

Under Windows you will need to un-comment the line in your php.ini file

;extension=gmp

within the php.ini and restart Apache.

MiquelFire ¶

13 years ago

With PHP 5.3 on Windows, you need to use the VC9 build, otherwise you will not have the dll to enable GMP

Chris ¶

13 years ago

Under Windows you will need to uncomment the line

;extension=php_gmp.dll

within the php.ini and restart Apache.

mike dot mackintosh at angrystatic dot com ¶

9 years ago

On Debian platforms, make sure you install the gmp development library first:

    sudo apt-get install libgmp-dev

Just like other extensions, you need the libs installed before php compile will gracefully complete.

admin at ee-dd dot com ¶

10 years ago

on ubuntu you can get it from Synaptic Package Manager
just search words "gmp",you'll find it.