Description
void
echo ( string arg1 [, string argn...])
Outputs all parameters.
echo() is not actually a function (it is a language
construct) so you are not required to use parentheses with it. In fact, if you
want to pass more than one parameter to echo, you must not enclose the
parameters within parentheses.
Example 1. echo() examples
<?php
echo "Hello
World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans\nmultiple
lines. The newlines will be\noutput as well.";
echo "Escaping characters
is done \"Like this\".";
// You can use variables inside
of an echo statement
$foo =
"foobar";
$bar =
"barbaz";
echo "foo is $foo";
// foo is foobar
// You can also use arrays
$bar =
array("value" =>
"foo");
echo "this is {$bar['value']}
!"; //
this is foo !
// Using single quotes will print the variable name, not the
value
echo 'foo
is $foo'; //
foo is $foo
// If you are not using any other characters, you can just
echo variables
echo $foo; //
foobar
echo $foo,$bar; //
foobarbarbaz
// Some people prefer passing multiple parameters to echo
over concatenation.
echo 'This
', 'string
', 'was
', 'made
', 'with
multiple parameters.', chr(10);
echo 'This ' .
'string ' .
'was ' .
'made ' .
'with concatenation.' .
"\n";
echo <<<END
This uses the "here
document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo is not a
function, following code is invalid.
($some_var)
? echo 'true' :
echo 'false';
// However, the following
examples will work:
($some_var)
? print('true'):
print('false');
// print is a function
echo $some_var
? 'true':
'false';
// changing the statement
around
?> |
|
echo() also has a shortcut syntax, where you can
immediately follow the opening tag with an equals sign.