What is “echo” in PHP?

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PHP echo output one or more string. It is a language construct not a function. So the use of parentheses is not required. But if you want to pass more than one parameter to echo, the use of parentheses is required.

Syntax:

void echo ( string $arg1 [, string $… ] )

In PHP, echo is a language construct used to output strings or variables to the web browser or standard output. It’s commonly used to display content dynamically on web pages. The syntax for echo is straightforward:

php
echo "Hello, world!";

You can also use echo to output variables:

php
$name = "John";
echo "Hello, $name!";

Additionally, echo can be used to output HTML along with PHP variables or values:

php
echo "<p>Hello, $name!</p>";

Overall, echo is an essential tool in PHP for generating dynamic content on web pages.