What is the difference between echo and print in PHP?

In PHP, both echo and print are functions used to output strings, but they have some differences.

1. Grammar: echo is a language structure that has no return value, can output multiple strings at the same time, and parentheses can be omitted; whereas print is a function that has a return value, can only output one string, and parentheses cannot be omitted.
2. The output speed of echo is slightly faster than print because echo does not return any value, while print returns 1.
3. When using variables, “echo” can directly display the value of the variable without needing parentheses, whereas with “print” the variable must be enclosed in parentheses.

In conclusion, echo is more commonly used in actual development because it is more flexible and slightly better in performance.