<?php

$content = ["ID" => 1, "name" => "孙悟空", "company" => "取经公司", "phone" => 13688888888, "email" => "sunwukong@php.com"];

// 第一种，while遍历


reset( $content ); // 数组指针指向第一位，第一次遍历后，each把数组指针指向了数组末尾，第二次遍历时会使表达式直接为flase，无法继续遍历。
while( list( $key, $value ) = each( $content ) )

    echo " {$key} => {$value} <br>";

echo '<hr>';

// 第二种，foreach遍历

foreach( $content as $key => $value )

    echo " {$key} => {$value} <br>";