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;
?>
|
|
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()
.