String size comparison Mechanism

Take the sorting of arrays in PHP as an example:

$ Arr = array ('A', 'AB,' AB ', 'abc'); array_multisort ($ ARR );

The result is a, AB, AB, and ABC.

The function of string comparison is to convert from left to right to ASCII code one by one. If it is equal, it continues until the comparison result is obtained.

When a string is compared with an integer or floating-point variable, the string is converted to an integer or floating-point type before comparison.

In addition, you must pay attentionSort_regular{Normal compare unit (without changing the variable type)} Be careful when sorting, because unpredictable results may occur.