Php array key name tips, array key name summary _ PHP Tutorial

Php array key name tips, array key name summary. Php array key name tips, array key name summary This article summarizes the php array key name techniques in detail. Share it with you for your reference. The specific analysis is as follows: 1. $ arr [true] equivalent php array key name tips summary, array key name summary

This article summarizes the php array key name techniques in detail. Share it with you for your reference. The specific analysis is as follows:

1. $ arr [true] is equivalent to $ arr [1]; $ arr [false] is equivalent to $ arr [0].

2. using null as the key name is equivalent to creating or overwriting a $ arr [null]. you can use $ arr [null] or $ arr [""] for access.

3. when a number with a decimal point is used as the key name, the key name will automatically take the integer part as the key name. For example, if $ arr [123.45] = 5, you can use $ arr [123.45] or $ arr [123] to obtain the key value. use foreach to repeat the time, $ arr [123] is used.

4. $ arr [] = 5. this element is added to the array $ arr.

Note: The data type of the middle-key in the array is integer or string.

I hope this article will help you with php programming.

This article summarizes the php array key name techniques in detail. Share it with you for your reference. The specific analysis is as follows: 1. $ arr [true] is equivalent...