How to convert characters into numbers in php

php method to convert characters into numbers: 1. Add the target type enclosed in parentheses before the variable to be converted; 2. Use a specific type conversion function; 3. Use the function [settype() 】.

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php method of converting characters into numbers:

1. The first conversion method: add the target type enclosed in parentheses before the variable to be converted, such as (int ); (bool); (float); (string); (array); (object)

2. The second conversion method: use three specific types Conversion function, intval(); floatval(); strval()

3. The third conversion method: settype();

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