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How to convert php to numbers: 1. Add the target type enclosed in parentheses before the variable to be converted; 2. Use the conversion function of the specific type of intval, floatval or strval; 3. Use "settype ();" method to convert.
php converts 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 of conversion functions, intval(); floatval(); strval()
3. The third conversion method: settype();
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