Question

php中关于数组问题如何从中提取我输出的值。

<?php
$food=array("牛奶","蛋糕","牛啡","蛋干","蛋尼玛");

foreach($food as $a){
print strstr($a,"牛");
}
echo $a
?>

代码就是这样，但是我想要把我 echo $a 得到如输出的是牛奶，牛啡，那我想要他输出一个 2 给我怎么办？

Answer 1

$food=array("牛奶","蛋糕","牛啡","蛋干","蛋尼玛");

foreach($food as $a){
if(in_array($a,'牛奶',''牛啡)){
$str = 2

}else{
$str = $a;

}
}
echo $str ;