Because PHP was originally designed for the web, the ability to output content into the browser easily has always been possible. There are 2 functions for this, print and echo. Which one you choose to use is largely a matter of personal preference because the differences are subtle and not usually important.

echo “test123”;

print “test123”;

Both the examples below will produce the identical output of only “test123”, of course without the quotes. Using single quotes versus double quotes when outputting does create a difference with certain content including variables.