How to convert string to floating point number in php

The methods to convert string to floating point number in PHP are: 1. Use the "(float)" function; 2. Use the "floatval()" function; 3. Use the "doubleval()" function; 4. Use Floating point constructor.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

In PHP, you can use type conversion to convert a string (string type) to a floating point number (float type) or a double-precision floating point number (double type). There are several ways to achieve this conversion:

1. Use (float) or floatval() function:

$stringNumber = "3.14";
floatNumber=(float)floatNumber = (float)floatNumber=(float)stringNumber; // 或者 floatNumber=floatval(floatNumber = floatval(floatNumber=floatval(stringNumber);

2. Use floatval() function:

$stringNumber = "3.14";
floatNumber=floatval(floatNumber = floatval(floatNumber=floatval(stringNumber);

3 , Use the doubleval() function:

$stringNumber = "3.14";
floatNumber=doubleval(floatNumber = doubleval(floatNumber=doubleval(stringNumber);

4. Use the floating point constructor:

$stringNumber = "3.14";
floatNumber=floatval(floatNumber = floatval(floatNumber=floatval(stringNumber);

No matter which method is chosen, the string will eventually be converted to the corresponding floating point type. Note that if the string cannot be parsed into a valid floating point representation, the conversion result will be 0.

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