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傳送到結果中的字串
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。
Example 1
案例1
<?php $str = "Who's Kai Jim?"; echo $str; echo "<br />"; echo $str."<br />I don't know!"; ?>
The output of the code above will be:
上述程式碼將輸出下面的結果:
Who's Kai Jim?Who's Kai Jim?I don 't know!
案例2
<?php echo "This textspans multiplelines."; ?>
The output of the code above will be:
上述程式碼將輸出下面的結果:
This text spans multiple lines.
案例3
<?php echo 'This ','string ','was ','made ','with multiple parameters'; ?>
The output of the code above will be:
上述程式碼將輸出下面的結果:
This string was made with multiple parameters
案例4
Difference of single and double quotes. Single quotes will print the variable name, not the value:
區別單引號(')和雙引號(”)的不同。單引號將輸出變數名稱,而不是變數的值:
<?php $color = "red"; echo "Roses are $color"; echo "<br />"; echo 'Roses are $color'; ?>
The output of the code above will be:
上述程式碼將輸出下面的結果:
Roses are redRoses are $color
案例5
Shortcut syntax:
簡寫(捷徑)語法:
<html> <body> <?php $color = "red"; ?> <p>Roses are <?=$color?></p> </body> </html>
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