What is PHP?
PHP is an open source scripting language used for web development that can be embedded in HTML code. PHP is known for its flexibility and large developer community. PHP can run on many operating systems including Windows, Linux and macOS and supports multiple databases such as MySQL, PostgreSQL and SQLite.
What is a string in PHP?
A PHP string consists of sequences of characters, where each character is represented by one byte. Since a byte can only be 256 characters long, Unicode strings are not natively supported in PHP. When creating a string in PHP, you can use single quotes ('...'), double quoted strings ("..."), and Heredoc syntax (<<<). PHP provides many built-in functions for replacing, splitting, concatenating, interpolating, and comparing strings. You can also convert string to lowercase, convert string to int, convert string to array, and find the length of the string.
What is int in PHP?
In PHP, an integer (int) is a data type used to represent whole numbers without decimal points. Integers can be specified in decimal, hexadecimal, octal, or binary notation. PHP also automatically converts numeric strings to integers when used in a numeric context, but if the string is not a valid numeric string, PHP interprets it as 0.
PHP Converting String to Int Examples
The following are examples of converting string to int in PHP:
Converting string to number using type casting
In PHP, we can change the type of a variable using the cast syntax: (int/float/double)$variable. In most cases, this is not required since PHP does an implicit type conversion in most cases.
Converting string to integer
To convert a string to an integer in PHP, you can use the intval() function:
Converting string to a floating-point number
To convert a string to a float in PHP, you can use the floatval() function:
Converting string to int by changing variable type
To set or change the type of a variable in PHP, you can use the settype(variable, type) function. The function takes two parameters: the variable we want to change and the type of the variable we need (integer, float, string, array, object, null).