PHP array type-numeric index array

A php numeric index array generally indicates the position of an array element in an array. it consists of digits. the subscript starts from 0. the default index value of a numeric index array starts from 0, you do not need to specify this parameter. PHP automatically assigns an integer to the key name of the index array, and then automatically increments the value. of course, you can also specify to save data from a certain position. PHP array type-numeric index array

What is a PHP digital index array?

This is the most common array type. most programming languages have numerical index arrays.

A php numeric index array generally indicates the position of an array element in an array. it consists of digits. the subscript starts from 0. the default index value of a numeric index array starts from 0, you do not need to specify this parameter. PHP automatically assigns an integer to the key name of the index array, and then automatically increments the value. of course, you can also specify to save data from a certain position.

An array can be constructed into a series of "key-value pairs", each of which is an array item or element ). Each item in the array corresponds to a key or index. The numeric index key value is as follows:

Case Study of the number index array:

 "PHP", "2" => "medium", "3" => "text", "4" => "net "); // declare the array print_r ($ array); // output the array element echo"
"; Echo $ array [1]; // output the value of the array element echo $ array [2]; // output the value of the array element echo $ array [3]; // output the value of the array element echo $ array [4]; // output the value of the array element?>

Output result:

The index array uses a 32-bit unsigned integer as the index number. The maximum size of the index array is 2-1, that is, 4,294,967,295. If the size of the array to be created exceeds the maximum value, a running error occurs.

The next chapter describes the PHP array type-associated array.

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