php unset array element by key

For Web programming, the most important thing is to access and read and write data. There may be many ways to store them, such as strings, arrays, files, and so on. arrays, which can be said to be a more important way of using PHP data. PHP's Array

arrays, which can be said to be a more important way of using PHP data. PHP's Array function is numerous, below is my study summary, takes this to remember, facilitates later to learn. 1. Array definition The definition of an array is defined using

PHP's Array function is numerous, below is my study summary, takes this to remember, facilitates later ... one, array definition:The definition of an array is defined using the array () method, and an empty array can be defined: . Foreach Traversal:

Arrays in PHP are actually an ordered ING. Valuing is a type that associates values with keys. This type has been optimized in many aspects, so it can be treated as a real array, or a list (vector), a hash list (an implementation of ing ), the array

Php array usage details PHP array functions are numerous. The following is a summary of my learning, so that you can easily identify them later ...... I. array definition: array definition is defined using array (). you can define an empty array:.

Is_array(PHP 4, PHP 5, PHP 7)is_array- Detecting If a variable is an arrayIs_array Mixed $var )If var it is an array, TRUE It is returned FALSE , otherwise. Explode(PHP 4, PHP 5, PHP 7)explode- using one string to split another stringArray

In the previous article, we introduced "how to add elements to the header and tail of a PHP array". since an element is added, an element is deleted, this article describes how to delete header and tail elements in an array, as well as any array

forum-20160919104018">forum-20160919104018">The array in PHP is actually an ordered map. A map is a type that associates values to the keys. This type is optimized in many ways, so it can be used as a real array, or as a list (vector), a hash (an

The array in PHP is actually an ordered map. A map is a type that associates values to the keys. This type is optimized in many ways, so it can be used as a real array, or as a list (vector), a hash (an implementation of a mapping), a dictionary, a

Deletes the PHP array header, tail, and any element implementation code. In the previous article, we introduced "how to add elements to the header and tail of a PHP array". Since an element is added, an element is deleted, this article describes how