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.";
- ?>
复制代码效果:
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]}";
- ?>
复制代码效果:
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):
- <?php
- print "<h2>PHP is fun!</h2>";
- print "Hello world!<br>";
- print "I'm about to learn PHP!";
- ?>
复制代码效果:
PHP is fun!
Hello world!
I'm about to learn PHP!
3.显示变量,下面的例子展示如何用 print 命令来显示字符串和变量:
- <?php
- $txt1="Learn PHP";
- $txt2="W3School.com.cn";
- $cars=array("Volvo","BMW","SAAB");
- print $txt1;
- print "<br>";
- print "Study PHP at $txt2 <br>";
- print "My car is a {$cars[0]}";
- ?>
复制代码效果:
Learn PHP
Study PHP at W3School.com.cn
My car is a Volvo
到此这篇关于php两种基本的输出方及实例详解的文章就介绍到这了。