What is the difference between echo and print in PHP?

In PHP, echo and print are both used to output data to the browser. However, there are a few differences between them:

1. echo is slightly faster than print, because it doesn’t return a value and doesn’t require a function call.

2. echo can output multiple strings separated by commas, while print can only output a single string.

For example, you can use echo like this:

echo "Hello, ", "world!";

But you cannot use print in the same way:

print "Hello, ", "world!"; // syntax error

3. print always returns 1, while echo does not return a value.

Here is an example of how to use print:

$result = print "Hello, world!";
echo $result; // output: 1

In general, echo is more commonly used, because it is faster and more flexible. However, print can be useful in certain situations, such as when you need to use it as an expression or when you want to output a value that can be tested in an if statement.

if (print "Hello, world!") {
    // this code will always be executed
}