It checks the return status of the previous command. && runs the following command if it succeeds, || runs the following command if it fails. Working examples:
These 2 Users Gave Thanks to Corona688 For This Post:
When I am browsing the web and I end up in a directory with no HTML index file (ie index.html), I see something like this:
Index of /k
Name Last modified Size Description
--------------------------------------------------------------------
115-1564_CRW.jpg ... (4 Replies)
Hello,
I want to make a graphical decription of a cluster H.P (shema) which runs with MC/Service Guard.
Does anyone know a web site where i can found a shema of this.
Lot of thanks... (1 Reply)
Hi,
I would like to know the significance of 2 way and 4 way and 8 way Hardware Description, like 2 way p595 and 4 way p695 servers.
What exactly does "2 way", "4 way" mean ? (1 Reply)
hi I need a Pseudo code or a description of what a program is saying from this spec and code:
Just so i can understand how this solution was achieved, thanks
here is the spec:
Specifications are as follows:-
The books records are stored in one csv file and the layout and the contents... (7 Replies)
Hi ,
I am new into solaris , need to know what a system Controller is , what it exactly does. Is it available in all Sun boxes or only on High end servers.
Is it similar to the Linux console in AIX boxes .
Thanks !!! (7 Replies)
Hi Experts,
i would like to know the description of the following:
Minimum: 0
Maximum: 90
Warning: 7
Inactive: -1
Last Change: Never
Password Expires: Never
Password Inactive: Never
Account Expires: Never
Does this means that... (2 Replies)
Hello Experts,
I need the description (like if user has done sudo,logging from winscp termial or ssh from other machine) using the last command.Can someone help me out please.
Thanks. (3 Replies)
Discussion started by: ahmed.vaghar
3 Replies
LEARN ABOUT PHP
echo
ECHO(3) 1 ECHO(3)echo - Output one or more stringsSYNOPSIS
void echo (string $arg1, [string $...])
DESCRIPTION
Outputs all parameters.
echo is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo (unlike some other
language constructs) does not behave like a function, so it cannot always be used in the context of a function. Additionally, if you want
to pass more than one parameter to echo, the parameters must not be enclosed within parentheses.
echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syn-
tax only works with the short_open_tag configuration setting enabled.
I have <?=$foo?> foo.
PARAMETERS
o $arg1
- The parameter to output.
o $...
-
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
echo examples
<?php
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans
multiple lines. The newlines will be
output 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
$baz = array("value" => "foo");
echo "this is {$baz['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.' . "
";
echo <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
SEE ALSO print(3), printf(3), flush(3), Heredoc syntax.
PHP Documentation Group ECHO(3)