PHP Echo: Usage Guide & Examples

In PHP, the Echo structure is used to output the value of data or variables to the browser or command line. Its syntax is:

echo 输出内容;

The output content can be a string, variable, array, etc. Here is an example:

$name = "Alice";
echo "Hello, $name!"; // 输出：Hello, Alice!

The Echo structure can be used in HTML tags to dynamically generate webpage content. For example:

$name = "Bob";
echo "<h1>Welcome, $name!</h1>"; // 输出：<h1>Welcome, Bob!</h1>