What s the maximum value for an int in PHP

Question

Ignoring the special libraries that allow you to work with very big numbers  what s the largest int value you can store in PHP

User · Answer

a little bit late  but could be useful   Only trust PHP INT MAX and PHP INT SIZE  this value vary on your arch  32 64 bits  and your OS     Any other  guess  or  hint  can be false

User · Answer

From the PHP manual   The size of an integer is platform-dependent  although a maximum value of about two billion is the usual value  that s 32 bits signed   PHP does not support unsigned integers  Integer size can be determined using the constant PHP INT SIZE  and maximum value using the constant PHP INT MAX since PHP 4 4 0 and PHP 5 0 5  64-bit platforms usually have a maximum value of about 9E18  except on Windows prior to PHP 7  where it was always 32 bit

User · Answer

Although PHP INT   constants exist for a very long time  the same MIN   MAX values could be found programmatically by left shifting until reaching the negative number    x   1  while   x  gt  0  amp  amp   x  lt  lt   1   echo  MIN      x  echo PHP EOL  echo  MAX       x

User · Answer

The size of PHP ints is platform dependent      The size of an integer is   platform-dependent  although a maximum   value of about two billion is the   usual value  that s 32 bits signed     PHP does not support unsigned   integers  Integer size can be   determined using the constant   PHP INT SIZE  and maximum value using   the constant PHP INT MAX since PHP   4 4 0 and PHP 5 0 5    PHP 6 adds  longs   64 bit ints

User · Answer

32-bit builds of PHP    Integers can be from -2 147 483 648 to 2 147 483 647     plusmn  2 billion    64-bit builds of PHP    Integers can be from -9 223 372 036 854 775 808 to 9 223 372 036 854 775 807     plusmn  9 quintillion    Numbers are inclusive   Note  some 64-bit builds once used 32-bit integers  particularly older Windows builds of PHP  Values outside of these ranges are represented by floating point values  as are non-integer values within these ranges   The interpreter will automatically determine when this switch to floating point needs to happen based on whether the result value of a calculation can t be represented as an integer   PHP has no support for  unsigned  integers as such  limiting the maximum value of all integers to the range of a  signed  integer

User · Answer

It subjects to architecture of the server on which PHP runs  For 64-bit   print PHP INT MIN            PHP INT MAX  yields -9223372036854775808  9223372036854775807

User · Answer

It depends on your OS  but 2147483647 is the usual value  according to the manual

User · Answer

Ah I found it  232 - 1  2147483647  http   au2 php net int  Integer overflow If PHP encounters a number beyond the bounds of the integer type  it will be interpreted as a float instead  Also  an operation which results in a number beyond the bounds of the integer type will return a float instead    lt  php  large number    2147483647  var dump  large number      output  int 2147483647    large number    2147483648  var dump  large number      output  float 2147483648

[php] What's the maximum value for an int in PHP?

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