How to implement PHP string Reverse order _ PHP Tutorial

This article describes how to implement PHP string reverse order. How to reverse the order of the last PHP string involves three knowledge points: 1. ceil () function: one method to get an integer. For example: 541.25, ceil (54) 2, no matter whether the decimal point is greater than us, how to reverse the order of the last PHP string involves three knowledge points:

1. ceil () function: returns an integer. For example: 5/4 = 1.25, ceil (5/4) = 2, whether or not the decimal point is greater than 0.5, they all enter an integer.

2. string access as an array, such as $ str [0], $ str [1]… You can access the first and second characters of the string $ str...

3. binary classification. Method 3 of PHP string inversion requires loop times to be the length of the string, and method 4 is half the length of the string, so the efficiency will be doubled (theoretically ).

The last PHP string reverse sequence method of merge involves three knowledge points: 1. ceil () function: returns an integer. For example: 5/4 = 1.25, ceil (5/4) = 2, regardless of whether the decimal point is greater...