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官方手册说明: Definition and Usage 定义和用法 The echo() function outputs one or more s. echo()的作用是:输出一个或多个。 Syntax 语法 echo(strings) Parameter参数 Description描述 strings d. 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 Tips and Notes 提示和注意点 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。 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: 上述代码将输出下面的结果: 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: 上述代码将输出下面的结果: 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: 上述代码将输出下面的结果: 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: 区别单引号(')和双引号(”)的不同。单引号将输出,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 redRoses are $color
案例5 Shortcut syntax: 简写(捷径)语法: <html>
<body>
<?php
$color = "red";
?>
<p>Roses are <?=$color?></p>
</body>
</html> |