What does php echo mean?

In PHP, the echo statement is used to output text or variables. It sends the provided content directly to the browser as part of an HTTP response to be displayed on the user interface.

The basic syntax of the echo statement is as follows:

echo expression;

In this case, the expression can be a string, a variable, or an expression. When using a string, it can be any text surrounded by single or double quotes. When using a variable or expression, echo will output its corresponding value.

Here are some examples of how it can be used:

$name = "John";
echo "Hello, ".$name."!"; // 输出: Hello, John!
$number = 10 + 5;
echo "The sum is: ".$number; // 输出: The sum is: 15
echo "This is a ", "multi-part ", "statement."; // 输出: This is a multi-part statement.

It is important to note that ‘echo’ is a statement, not a function, so the parentheses can be omitted. Additionally, ‘echo’ can output multiple parameters at once, which will be concatenated into a single string for output.

In conclusion, echo in PHP is used to output text, variables, or expressions to the browser in order to interact with users or display information on the interface.