Detailed explanation of php echo output string function_PHP tutorial

Copy code The code is as follows:

echo "asd";//String
echo "ads$c";// String + variable
echo 'ads$c';//String asd$c $c is not a variable
echo "sd"."vs";
echo "sd","vs";
echo $a;
echo $a.$b;
echo $a,$b;
echo $a.$b.$c;
echo $a,$b,$ c;
echo "kaskd{$c}asd";
echo "kakskd{$arr['lo']}";
echo "kakskd{$obj->a}";
echo "kaskd".$c."kasd";
echo "kaskd".$arr['lo']."kasd";
echo "kaskd".$obj->a."kasd ";
echo "kaskd".func($c)."kasd";
echo "kaksk".($a+1)."dkkasd";
echo $c."jaksd";
echo $c,"jaksd";
//php multi-line output method
echo <<This uses the "here document" syntax to output
END;
//Output abbreviation
　

Copy code The code is as follows:

echo "Hello World";

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

echo "This spansnmultiple lines. The newlines will benoutput 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.' . "n";

echo <<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
?>

The following is the official manual description:
Definition and Usage
Definition and Usage
The echo() function outputs one or more strings.
The echo() function outputs one or more strings.
Syntax
Syntax
echo(strings)
Parameter parameter Description
strings Required. One or more strings to be sent to the output
Required parameters. Specify one or more strings that need to be sent to the result
Tips and Notes
Tips and Notes
Note: The echo() function is not actually a function, so you are not required to use parentheses with it. However, if you want to pass more than one parameter to echo(), using parentheses will generate a parse error.
Note: The echo() function is not a real function, so you don’t have to Go use it. If you want to pass more than one argument to the echo() function, using parentheses "()" will generate an error.
Tip: The echo() function is slightly faster than print().
Tip: The echo() function is equivalent to a simplified version of the print() function.
Tip: The echo() function has the following shortcut syntax. See example 5.
Tip: The echo() function has the following shortcut syntax. For details, see: Case 5.
Example 1
Case 1

Copy code The code is as follows:

$ str = "Who's Kai Jim?";
echo $str;
echo "
";
echo $str."
I don't know!" ;
?>

The output of the code above will be:
The above code will output the following result:
Who's Kai Jim?Who's Kai Jim?I don' t know!

Example 2
Case 2

Copy code The code is as follows:

< ?php
echo "This textspans multiplelines.";
?>

The output of the code above will be:
The above code will output the following results:
This text spans multiple lines.

Example 3
Case 3

Copy code The code is as follows:

echo 'This ','string ','was ','made ' ,'with multiple parameters';
?>

The output of the code above will be:
The above code will output the following result:
This string was made with multiple parameters

Example 4
Case 4
Difference of single and double quotes. Single quotes will print the variable name, not the value:
Difference between single quotes (') and double quotes ( ”). Single quotes will output the variable name instead of the variable value:

Copy code The code is as follows:

$color = "red";
echo "Roses are $color";
echo "
";
echo 'Roses are $color';
?>

The output of the code above will be:
The above code will output the following results:
Roses are redRoses are $color

Example 5
Case 5
Shortcut syntax:
Shortcut (shortcut) syntax:

Copy code The code is as follows:

$color = "red";
?>

Roses are < ;/p>

http://www.bkjia.com/PHPjc/321769.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/321769.htmlTechArticleCopy the code The code is as follows: echo "asd";//String echo "ads$c";//Character String + variable echo 'ads$c';//String asd$c $c is not a variable echo "sd"."vs"; echo "sd","vs"; echo $a; echo $a.$b; ...