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unabletoprintecho和print语句

时间:2021-07-01 10:21:17 帮助过:27人阅读

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——能够输出一个以上的字符串,无返回值
  • print——只能输出一个字符串,并始终返回值为1

echo的语句:

echo是一个语言结构,有无括号均可使用:echo 或echo();

例如:

显示字符串:

echo "

PHP is fun!

";

echo "Hello world!";

echo "计划","学习","PHP";

?>

显示变量:

$txt1 = "Learn PHP";

$txt2 = "***.com";

$cars = array("Volvo","BWM","AABB");

echo $txt1;

echo "
";

echo "Study PHP at $txt2";

echo "
";

echo "my car is a {$cars[0]}";

?>

print的语句:

print也是语言结构,有无括号均可使用: print 或 print();

显示字符串:

print "

PHP is fun!

";

print ""Hello world!
";

print "I'm about to learn PHP!";

?>

显示变量:

$txt1="Learn PHP";

$txt2="W3School.com.cn";

$cars=array("Volvo","BMW","SAAB");

print $txt1;

print "
";

print "Study PHP at $txt2";

print "My car is a {$cars[0]}";

?>

好了,暂时就这些了,想起来再补,欢迎广大网友来喷!!!!!!

以上就介绍了unable to print echo和print语句,包括了unable to print方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

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