How many numbers can be stored in a php array?

How many numbers can be stored in a PHP array?

In PHP, array is a very common data structure. It is a container that can store multiple values, and each value has a corresponding key for easy query and access. When using PHP arrays, there is a very important issue that we need to consider, and that is how large a number it can store.

To answer this question, we need to first understand the data types supported by PHP. PHP mainly supports the following data types:

1. Boolean: represents true or false.

2. Integer type (integer): represents an integer, ranging from -2147483648 to 2147483647.

3. Floating point type (float): represents a decimal, approximately between -2.0E 308 and 1.8E 308.

4. String type (string): represents text, which can contain any characters, including numbers, letters, symbols, etc.

5. Array type (array): It can accommodate any number of values, and each value has a corresponding key.

6. Object type (object): Represents an instance object, which is a custom complex data type.

7. Resource type (resource): Indicates resources obtained through external operations (such as file operations, database operations, etc.).

According to the range that PHP's data type can store, you can get the size of the number that the PHP array can store. In PHP, the key value in the array can be a string or an integer. If it is an integer, the key starts from 0 (0 is also counted). According to the above, the maximum value of the integer type is 2147483647, so in PHP, the maximum value of the integer key in the array is also 2147483647.

So, what should we do if we need to store a larger number than this? At this time we can use the arbitrary precision calculation (big integer) library supported by PHP. By using this library, we can perform various operations such as addition, subtraction, multiplication, and division on numbers of any length, thereby solving the problem of PHP array storage number size limit.

Usage example:

$num1 = '92233720368547758079223372036854775807'; $num2 = '99999999999999999999999999999999999'; $result = bcadd($num1, $num2); //任意长度的加法运算 echo $result;

The final output result is: 92233720368547758079223472036854775806

Through PHP's arbitrary precision calculation library, we can easily perform numerical calculations that exceed the maximum value of the integer type . However, it should be noted that although the arbitrary precision calculation library is powerful, it will also bring a certain performance loss, so you need to carefully consider the specific usage scenarios when using it.

To sum up, the maximum integer size that an array in PHP can store is 2147483647. But if we need to store numbers larger than this, we can use the arbitrary precision calculation library supported by PHP to solve this problem.

The above is the detailed content of How many numbers can be stored in a php array?. For more information, please follow other related articles on the PHP Chinese website!