PHP-008-【输出】-echo 和 print区别

区别是

1. echo - 能够输出一个以上的字符串
2. print - 只能输出一个字符串，并始终返回 1
3. 提示：echo 比 print 稍快，因为它不返回任何值。

两个语句在输出的时候 有无括号都可以

相同点
echo显示字符串

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

echo显示变量

<?php
$txt1="Learn PHP";
$txt2="W3School.com.cn";
$cars=array("Volvo","BMW","SAAB");

echo $txt1;
echo "<br>";
echo "Study PHP at $txt2";
echo "My car is a {$cars[0]}";
?>

print显示字符串

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

 print显示变量

<?php
$txt1="Learn PHP";
$txt2="W3School.com.cn";
$cars=array("Volvo","BMW","SAAB");

print $txt1;
print "<br>";
print "Study PHP at $txt2";
print "My car is a {$cars[0]}";
?>