How To Convert String To Int In Php

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In this blog post, we will learn how to convert a string to an integer in PHP. There are several ways to achieve this, and we will discuss some of the most common methods. Let’s dive in!

Method 1: Using Type Casting

The first method is using type casting. In this method, you simply put (int) before the variable that you want to convert to an integer. Here’s an example:

$string = "123";
$integer = (int)$string;
echo $integer; // Output: 123

When you use type casting, if the string contains non-numeric characters, the conversion will stop at the first non-numeric character. For example:

$string = "123abc";
$integer = (int)$string;
echo $integer; // Output: 123

Method 2: Using the intval() Function

The second method is using the intval() function. This function takes the string as an argument and returns its integer value. Here’s an example:

$string = "123";
$integer = intval($string);
echo $integer; // Output: 123

Similar to type casting, if the string contains non-numeric characters, the conversion will stop at the first non-numeric character:

$string = "123abc";
$integer = intval($string);
echo $integer; // Output: 123

Method 3: Using the settype() Function

The third method is using the settype() function. This function takes two arguments: the variable you want to convert, and the type you want to convert it to. The function returns a boolean value that indicates whether the conversion was successful or not. Here’s an example:

$string = "123";
$success = settype($string, "integer");
echo $string; // Output: 123

Note that in this method, the $string variable itself is converted to an integer, rather than creating a new variable. Like the other methods, the conversion stops at the first non-numeric character:

$string = "123abc";
$success = settype($string, "integer");
echo $string; // Output: 123

Conclusion

In this blog post, we have learned how to convert a string to an integer in PHP using three different methods: type casting, the intval() function, and the settype() function. Choose the method that best suits your needs and start converting strings to integers like a pro!