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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>  |