php两种基本的输出方及实例详解

在本篇文章里小编给大家整理了一篇关于php两种基本的输出方及实例详解内容，有需要的朋友们可以跟着学习参考下。

在 PHP 中，有两种基本的输出方法：echo 和 print。

echo 和 print 之间的差异

echo - 输出一个或多个字符串，可以接受多个参数并且没有返回值
print - 只能输出一个字符串，只能接受一个参数并且有返回值，并始终返回 1
提示：echo 比 print 稍快，因为它不返回任何值。

PHP echo 语句
1.echo 是一个语言结构，有无括号均可使用：echo 或 echo();

2.显示字符串,下面的例子展示如何用 echo 命令来显示不同的字符串（同时请注意字符串中能包含 HTML 标记）

<?php
echo "<h2>PHP is fun!</h2>";
echo(123);
echo "<br>";
echo("我爱php");
echo "<br>";
echo "Hello world!<br>";
echo "I'm about to learn PHP!<br>";
echo "This", " string", " was", " made", " with multiple parameters.";
?>

效果:

PHP is fun!
123
我爱php
Hello world!
I’m about to learn PHP!
This string was made with multiple parameters.

3.显示变量,下面的例子展示如何用 echo 命令来显示字符串和变量;

<?php
$txt1="Learn PHP";
$txt2="W3School.com.cn";
$cars=array("Volvo","BMW","SAAB");
echo $txt1;
echo "<br>";
echo "Study PHP at $txt2 <br />";
echo "My car is a {$cars[0]}";
?>

效果:

Learn PHP
Study PHP at W3School.com.cn
My car is a Volvo

PHP print 语句
1、print 也是语言结构，有无括号均可使用：print 或 print()。

2、显示字符串,下面的例子展示如何用 print 命令来显示不同的字符串（同时请注意字符串中能包含 HTML 标记）：

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<?php
print "<h2>PHP is fun!</h2>";
print "Hello world!<br>";
print "I'm about to learn PHP!";
?>

效果:

Learn PHP
Study PHP at W3School.com.cn
My car is a Volvo

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