php echo 输出字符串函数详解

2019-04-09 20:27:07于丽

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!

Example 2
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.

Example 3
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

Example 4
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 redRoses are $color

Example 5
案例5
Shortcut syntax:
简写(捷径)语法:

<html><body>
<?php
$color = "red";
?><p>Roses are <?=$color?></p></body></html>

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