php兩種基本的輸出方及實例詳解

在 PHP 中，有兩種基本的輸出方法：echo 和 print。

echo 和 print 之間的差異：

echo - 輸出一個或多個字符串，可以接受多個參數並且沒有返回值。

print - 只能輸出一個字符串，只能接受一個參數並且有返回值，並始終返回 1。

提示：echo 比 print 稍快，因爲它不返回任何值。

PHP echo 語句

1.echo 是一個語言結構，有無括號均可使用：echo 或 echo();

2.顯示字符串,下面的例子展示如何用 echo 命令來顯示不同的字符串（同時請注意字符串中能包含 HTML 標記）

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

3.顯示變量,下面的例子展示如何用 echo 命令來顯示字符串和變量;

<?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 語句

1、print 也是語言結構，有無括號均可使用：print 或 print()。

2、顯示字符串,下面的例子展示如何用 print 命令來顯示不同的字符串（同時請注意字符串中能包含 HTML 標記）：

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

效果:

PHP is fun!
Hello world!
I'm about to learn PHP!

3.顯示變量,下面的例子展示如何用 print 命令來顯示字符串和變量：

<?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]}";?>

效果:

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

到此這篇關於php兩種基本的輸出方及實例詳解的文章就介紹到這了，希望大家以後多多支持好二三四！

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