当前位置: 首页 > 网络学院 > 服务端脚本教程 > PHP > echo()函数
The echo() function outputs one or more strings.
echo()函数的作用是:输出一个或多个字符串。
echo(strings) |
Parameter参数 | Description描述 |
---|---|
strings | Required. One or more strings to be sent to the output 必要参数。指定一个或多个需要被发送到结果中的字符串 |
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()函数不是一个真正意义上的函数,所以你没有必要一定去使用它。如果你想把多于一个的参数传递给echo()函数,那么使用圆括号“()”将产生错误。
Tip: The echo() function is slightly faster than print().
提示:echo()函数相当于print()函数的简化版本。
Tip: The echo() function has the following shortcut syntax. See example 5.
提示:echo()函数包含下面的简便写法。具体见:案例5。
<?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:
上述代码将输出下面的结果:
Who's Kai Jim? Who's Kai Jim? I don't know! |
<?php echo "This text spans multiple lines."; ?> |
The output of the code above will be:
上述代码将输出下面的结果:
This text spans multiple lines. |
<?php echo 'This ','string ','was ','made ','with multiple parameters'; ?> |
The output of the code above will be:
上述代码将输出下面的结果:
This string was made with multiple parameters |
Difference of single and double quotes. Single quotes will print the variable name, not the value:
区别单引号(’)和双引号(”)的不同。单引号将输出变量名,而不是变量的值:
<?php $color = "red"; echo "Roses are $color"; echo "<br />"; echo 'Roses are $color'; ?> |
The output of the code above will be:
上述代码将输出下面的结果:
Roses are red Roses are $color |
Shortcut syntax:
简写(捷径)语法:
<html> <body> <?php $color = "red"; ?> <p>Roses are <?=$color?></p> </body> </html> |