PHP echo()函数讲解

<?php 
echo "Hello world!"; 
?>

echo( _strings_ )

<?php 
$str = "Hello world!"; 
echo $str; 
?>

<?php 
$str = "Hello world!"; 
echo $str; 
echo "<br>What a nice day!"; 
?>

<?php 
$str1="Hello world!"; 
$str2="What a nice day!"; 
echo $str1 . " " . $str2; 
?>

<?php 
$age=array("Peter"=>"35"); 
echo "Peter is " . $age['Peter'] . " years old."; 
?>

<?php 
echo "This text 
spans multiple 
lines."; 
?>

<?php 
echo 'This ','string ','was ','made ','with multiple parameters.'; 
?>

<?php 
$color = "red"; 
echo "Roses are $color"; 
echo "<br>"; 
echo 'Roses are $color'; 
?>

<?php 
$color = "red"; 
?>