print输出函数的学习

<?php

   print("Hello World<br>");

   print "print() also works without parentheses.<br>";

   print "This spans multiple lines. The newlines will be output as well<br>";

   print "This spans/nmultiple lines. The newlines will be/noutput as well.<br>";

   print "escaping characters is done /"Like this/".<br>";

   // You can use variables inside of a print statement

   $foo = "foobar";

   $bar = "barbaz";

   print "foo is $foo<br>"; // foo is foobar

   // You can also use arrays

   $bar = array("value" => "foo");

   print "this is {$bar['value']} !<br>"; // this is foo !

   // Using single quotes will print the variable name, not the value

   print 'foo is $foo<br>'; // foo is $foo

   // If you are not using any other characters, you can just print variables

   print $foo.'<br>';          // foobar

   print <<<END

   This uses the "here document" syntax to output<br>

   multiple lines with $variable interpolation. Note

   that the here document terminator must appear on a

   line with just a semicolon no extra whitespace!

END;

?>

===============================

输出结果：

Hello World

print() also works without parentheses.

This spans multiple lines. The newlines will be output as well

This spans multiple lines. The newlines will be output as well.

escaping characters is done "Like this".

foo is foobar

this is foo !

foo is $foo

foobar

This uses the "here document" syntax to output

multiple lines with interpolation. Note that the here document terminator must appear on a line with just a semicolon no extra whitespace!