{"id":351,"date":"2021-03-15T00:15:14","date_gmt":"2021-03-15T00:15:14","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=351"},"modified":"2025-04-05T14:20:23","modified_gmt":"2025-04-05T14:20:23","slug":"php-int","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-int\/","title":{"rendered":"PHP int"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about the PHP int type representing integers in PHP.<\/p>\n\n\n\n

Introduction to the PHP int type #<\/a><\/h2>\n\n\n\n

Integers are whole numbers such as -3, -2, -1, 0, 1, 2, 3… PHP uses the int<\/code> type to represent the integers.<\/p>\n\n\n\n

The range of integers depends on the platform where PHP runs. Typically, integers has a range from -2,147,438,648 to 2,147,483,647. It’s equivalent to 32 bits signed.<\/p>\n\n\n\n

To get the size of the integer, you use the PHP_INT_SIZE<\/code> constant. Also, you use the PHP_INT_MIN<\/code> and PHP_INT_MAX<\/code> constants to get the minimum and maximum integer values.<\/p>\n\n\n\n

PHP represents integer literals in decimal, octal, binary, and hexadecimal formats.<\/p>\n\n\n\n

Decimal numbers #<\/a><\/h3>\n\n\n\n

PHP uses a sequence of digits without leading zeros to represent decimal values. The sequence may begin with a plus or minus sign. If it has no sign, then the integer is positive. For example:<\/p>\n\n\n

2000\n-100\n12345<\/code><\/span><\/pre>\n\n\n
From PHP 7.4, you can use the underscores (_) to group digits in an integer to make it easier to read. For example, instead of using the following number:<\/p>\n\n\n
1000000<\/code><\/span><\/pre>\n\n\n
you can use the underscores (_) to group digits like this:<\/p>\n\n\n
1_000_000<\/code><\/span><\/pre>\n\n\n
Octal numbers #<\/a><\/h3>\n\n\n\n
Octal numbers consist of a leading zero and a sequence of digits from 0 to 7. Like decimal numbers, octal numbers can have a plus (+) or minus (-) sign. For example:<\/p>\n\n\n
+010<\/span> \/\/ decimal 8<\/span><\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
Hexadecimal numbers #<\/a><\/h3>\n\n\n\n
Hexadecimal numbers consist of a leading 0x<\/code> and a sequence of digits (0-9) or letters (A-F). The letters can be lowercase or uppercase. By convention, letters are written in uppercase.<\/p>\n\n\n\n
Like decimal numbers, hexadecimal numbers can include a sign, plus (+) or minus(-). For example:<\/p>\n\n\n
0x10<\/span> \/\/ decimal 16<\/span>\n0xFF<\/span> \/\/ decimal 255<\/span><\/code><\/span>Code language:<\/span> JSON \/ JSON with Comments<\/span> (<\/span>json<\/span>)<\/span><\/small><\/pre>\n\n\n
Binary numbers #<\/a><\/h3>\n\n\n\n
Binary numbers begin with 0b<\/code> are followed by a sequence of digits 0 and 1. The binary numbers can include a sign. For example:<\/p>\n\n\n
0b10<\/span> \/\/ decimal 2<\/span><\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
The is_int() function #<\/a><\/h2>\n\n\n\n
The is_int()<\/code> built-in function returns true<\/code> if a value (or a variable<\/a>) is an integer. Otherwise, it returns false<\/code>. For example:<\/p>\n\n\n
<?php<\/span>\n\n$amount = 100<\/span>;\necho<\/span> is_int($amount);<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1<\/code><\/span><\/pre>\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
    \n
  • Integers are whole numbers such as -1, 0, 1, 2…<\/li>\n\n\n\n
  • Use the PHP_INT_SIZE<\/code> constant to get the size of the integer<\/li>\n\n\n\n
  • Use the PHP_INT_MIN<\/code> and PHP_INT_MAX<\/code> constants to get the minimum and maximum integer values.<\/li>\n\n\n\n
  • Literal integers can be in decimal, octal, hexadecimal, and binary forms.<\/li>\n\n\n\n
  • Use the is_int()<\/code> function returns true if a value (or variable) is an integer.<\/li>\n<\/ul>\n
    \n\t
    \n\t\t
    Did you find this tutorial useful?<\/div>\n\t\t
    \n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t<\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t
    \n\t\t
    \n\t\t\t
    <\/div>\n\t\t\t\n\t\t\t
Try it<\/a><\/p>\n\n\n\n