echo "asd";//字符串 echo "ads$c";//字符串+变量 echo 'ads$c';//字符串 asd$c $c不是变量 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多行输出方法 echo <<<END This uses the "here document" syntax to output END; //输出简写 <?php echo $a;?> <?=$a?>
<?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 $baz = array("value" => "foo"); echo "this is {$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 <<<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 ?>
以下是官方手冊說明:
Definition and Usage
定義和用法
The echo() function outputs one or more strings.
echo()函數的作用是:輸出一個或多個字串。
Syntax
語法
echo(strings)
Parameter參數 Description描述
strings Required. One or more strings to be sent to the output
必要參數。指定一個或多個需要被送到結果中的字串
Tips and Notes
提示和注意點
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.
注意:echo()函數不是一個真正意義上的函數,所以你沒有必要一定去使用它。如果你想把多於一個的參數傳遞給echo()函數,那麼使用圓括號「()」將會產生錯誤。
Tip: The echo() function is slightly faster than print().
提示:echo()函數相當於print()函數的簡化版本。
Tip: The echo() function has the following shortcut syntax. See example 5.
提示:echo()函數包含下面的簡便寫法。具體見:案例5。 I
<?php $str = "Who's Kai Jim?"; echo $str; echo "<br />"; echo $str."<br />I don't know!"; ?>
Example 3
案例33] 37be 將上述程式碼輸出下面的結果:
This string was made with multiple parameters
Example 4
Difference of single and double quotes. Stes will print the valable name, 名詞(”)的不同。單引號將輸出變數名,而不是變數的值:
<?php echo "This textspans multiplelines."; ?>
簡寫(捷徑)文法:
<?php echo 'This ','string ','was ','made ','with multiple parameters'; ?>