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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https://www.233tw.com/php/117052
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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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