PHP intval | How to Covert PHP string to int with Example?
Summary: in this article, you will learn How to Covert PHP string to int(integer) with Example? In this guide, I will show you four different methods to accomplish this, such as-
- 1st method: using number_format() Function
- 2nd method: using intval() and floatval() Function
- 3rd method: using type casting
- 4th method: By adding 0 or by performing mathematical operations.
Answer: To Covert PHP string to int
Strings in PHP can be converted to numbers (float/int/double) terribly simple. In most use cases, it won’t be needed since PHP does implicit type conversion. There are many methods to convert PHP string to integer. but here, I will discuss four methods as given below:
I-method: Using number_format() Function
Using PHP number_format() Function. The number_format() function in PHP is used to convert the string into a number. furthermore, it returns the formatted number on success otherwise it will give E_WARNING on failure.
Example:
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<?php $num1 = "1500.225"; // Convert string in number using // number_format(), function echo number_format($num1), "\n"; // Convert string in number using // number_format(), function echo number_format($num1, 2); $num2 = "999.514"; // Convert string in number using // number_format(), function echo number_format($num2), "\n"; // Convert string in number using // number_format(), function echo number_format($num2, 2); ?> |
1,500.23
1,000
999.51
II-method: Using intval() and floatval() Function
To convert the string into its corresponding integer(int) and float values respectively used PHP intval() and floatval() Function. let’s see the example.
Example:
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<?php // Number in string format $num1 = "1500.225"; // intval() function to convert // string into integer echo intval($num1), "\n"; // floatval() function to convert // string to float echo floatval($num1); // Number in string format $num2 = "999.514"; // intval() function to convert // string into integer echo intval($num2), "\n"; // floatval() function to convert // string to float echo floatval($num2); ?> |
1500.225
999
999.514
III-method: Using type casting
Typecasting can directly convert a string into a float, double, or integer primitive type. This is the most effective and best way to convert a string into a number without any function.
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<?php // Number in string format $num = "100000.225"; // Type cast using int echo (int)$num, "\n"; // Type cast using float echo (float)$num, "\n"; // Type cast using double echo (double)$num; ?> |
100000.225
100000.225
As we all know that PHP doesn’t need or support explicit type definition in variable declaration. furthermore, you can force a variable to be evaluated as a certain type using the typecasting method.
Let’s see another example to understand how this works:
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<?php $num = "25.86"; // Cast to integer $int = (int)$num; echo gettype($int); // Outputs: integer echo $int; // Cast to float $float = (float)$num; echo gettype($float); // Outputs: double echo $float; ?> |
double25.86
You can use (int) or (integer) to cast a variable to an integer, use (float), (double), or (real) to cast a variable to float. Similarly, you’ll be able to use the (string) to cast a variable to string, and so on.
The gettype() function in PHP returns "double" in the case of a float for historical reasons.
Alternatively, you can also use the PHP intval() function to get the integer value of a variable.
IV-method: By adding 0 or by performing mathematical operations
By adding 0 or by performing mathematical operations. Therefore, the string number can also be converted into an integer(int) or float by adding 0 with the string. furthermore, in PHP, performing mathematical operations, the string is converted to an integer(int) or float implicitly.
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<?php // Number into string format $num = "9999.513"; // Performing mathematical operation // to implicitly type conversion echo $num + 0, "\n"; // Performing mathematical operation // to implicitly type conversion echo $num + 0.0, "\n"; // Performing mathematical operation // to implicitly type conversion echo $num + 0.1; ?> |
9999.513
9999.613
PHP string to int conclusion
In this article, you have learned the conversion of PHP string to an integer using four different methods for example. I hope you will enjoy it!. if have any query then contact on info@tutorialscan.com I will try to resolve the problem.
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