PHP的”= “符号
在PHP中”= “符号是用于在数组中分配键值对,主要在关联数组中使用。【视频教程推荐:PHP教程】
基本句式:
key = value
说明:”= “符号的左侧值称为键,右侧值称为键值。
“= “符号的使用示例
下面通过简单代码示例来介绍”= “符号的使用方法。
示例1:使用“= ”符号创建关联数组
<?php
header("content-type:text/html;charset=utf-8");
$subject = array( "Maths" = 95,
"Physics" = 90,
"Chemistry" = 96,
"English" = 93,
"Computer" = 98
);
echo "学生成绩:<br <br ";
echo "数学:" . $subject["Maths"], "<br ";
echo "物理:" . $subject["Physics"], "<br ";
echo "化学:" . $subject["Chemistry"], "<br ";
echo "英语:" . $subject["English"], "<br ";
echo "计算机:" . $subject["Computer"], "<br ";
?
输出:
示例2:使用“= ”符号创建数字索引数组
<?php
$arr = array( "0" = 7,
"1" = 10,
"2" = 8,
"3" = 5
);
foreach($arr as $key = $value) {
echo $key . " = " . $value . "<br ";
}
?
输出:
示例3:用于在不使用“= ”符号的情况下分配数字索引
<?php
header("content-type:text/html;charset=utf-8");
$name = array("Zack", "Anthony",
"Ram", "Salim", "Raghav");
foreach($name as $key = $value) {
echo $key . " = " . $value . "<br ";
}
?
输出: