Hello World in PHP
The echo function can be used to output strings in PHP. If a variable is passed to this function, it outputs this variable. If a string is passed to it instead, echo displays it as long as it is enclosed in single or double-quotes. The following example shows a script that is nothing more than “Hello World!”. Both single and double quotation marks are used once.
Example :
<?php
echo("Hello World!");
echo('Hello World!');
?>
Output:
Hello World!Hello World!
A line break is not visible because none was passed to the echo function. The following code is the same as the above code, but this time with a line break:
<?php
echo("Hello World!\n");
echo('Hello World!');
?>
Output:
Hello World! Hello World!
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