What is PHP?
What is a string in PHP?
In PHP, a string consists of a sequence of characters, each represented by one byte. Due to the fact that a byte can only accommodate 256 characters, PHP does not natively support Unicode strings. To create a string in PHP, you have the option of utilizing single quotes ('...'), double-quoted strings ("..."), or Heredoc syntax (<<<). PHP offers a variety of built-in functions for manipulating strings, including splitting, replacing, concatenating, and comparing. Furthermore, you can easily convert strings to lowercase, convert string to int, convert string to array, and determine the length of a string.
What is string interpolation?
String interpolation (variable interpolation, variable substitution, or variable expansion) is the method of evaluating a string literal containing one or more placeholders, in which the placeholders are replaced with the appropriate values. In almost all languages, interpolation is preferred over concatenation for combining strings. At the same time, the string turns out to be glued, and spaces and other characters are clearly visible inside it.
PHP Interpolate Strings Examples
The following are examples of string interpolation in PHP:
String interpolation with variables
The following is an example of string interpolation when the specified variable is substituted at the desired location in the string:
Multiple string interpolation
The following is an example of interpolating multiple strings:
Interpolating strings with escape characters
The following is an example of string interpolation with escape characters:
Interpolating strings with arrays
The following is an example of string interpolation with an array: