print
(PHP 3, PHP 4, PHP 5 )
print -- Output a string
Description
int
print ( string arg)
Outputs arg. Returns 1,
always.
print() is not actually a real function (it is a
language construct) so you are not required to use parentheses
with its argument list.
例子 1. print() examples
<?php
print("Hello World");
print "print() also works without parentheses.";
print "This spans
multiple lines. The newlines will be
output as well";
print "This spans\nmultiple lines. The newlines will be\noutput as well.";
print "escaping characters is done \"Like this\".";
// You can use variables inside of a print statement
$foo = "foobar";
$bar = "barbaz";
print "foo is $foo"; // foo is foobar
// You can also use arrays
$bar = array("value" => "foo");
print "this is {$bar['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
print 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just print variables
print $foo; // foobar
print <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon no extra whitespace!
END;
?>
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For a short discussion about the differences between
print() and echo(), see this FAQTs
Knowledge Base Article: http://www.faqts.com/knowledge_base/view.phtml/aid/1/fid/40
注: 由于这是一个语言结构而非函数，因此它无法被“变量函数”调用。
See also echo(), printf(),
and flush().