PHP循环语句

---

title: PHP循环语句
date: 2018-5-18
categories:

• PHP学习笔记
  tags:
• php

---

foeach语句

<?php
    header("Content-type:text/html;charset=utf-8");
    
    $stu = array('中文昵称' => '沫沫',
                '英文昵称' => 'Mo',
                '外号' => '小沫猪');

    foreach ($stu as $key => $value) {
        echo $key.'----'.$value.'<br>';
    }

    $swt = array('今天', '天气', '真热！');
    foreach ($swt as $value) {
        echo $value;
    }
?>

嵌套循环

<?php
    header("Content-type:text/html;charset=utf-8");
    
    echo "<br>--------嵌套的while循环--------<br>";
    $num = 1;
    while ($num <= 10) {
        $i = 1;
        while ($i <= $num) {
            echo $i.' ';
            ++$i;
        }
        echo '<br>';
        ++$num;
    }

    echo "<br>--------while嵌入for循环--------<br>";
    $num = 1;
    while ($num <= 10) {
        for($i = 1; $i <= $num; ++$i){
            echo $i.' ';
        }
        echo '<br>';
        ++$num;
    }

    echo "<br>--------for嵌入while循环--------<br>";
    for($num = 1; $num <= 10; ++$num){
        $i = 1;
        while ($i <= $num) {
            echo $i.' ';
            ++$i;
        }
        echo '<br>';
    }

    echo "<br>--------for嵌入for循环--------<br>";
    for($num = 1; $num <= 10; ++$num){
        for($i = 1; $i <= $num; ++$i){
            echo $i.' ';
        }
        echo '<br>';
    }
	
	echo "<br>--------嵌套的foreach循环--------<br>";
    $students = array(
        array('name' => '张三',
            'age' => 20,
            'sex' => '男')
    );
    array('name' => '李四',
            'age' => 23,
            'sex' => '男')
    );
    
    foreach ($students as $stu) {
        echo '<p>';
        foreach ($stu as $key => $value) {
            echo $key.'---'.$value.'<br>';
        }
    }
?>

循环遍历

<?php
    header("Content-type:text/html;charset=utf-8");

    $id_list = [1, 5, 4, 6];
    $name_list = ["jack", "tom", "张三", "李四"];
    $age_list = [12, 11, 22, 24];
    $address_list = ["江西赣州", "江西九江", "江西南昌", "江西吉安"];
    $classNO_list = ["B1631", "B1632", "A1666", "C1444"];

    echo "-----for循环遍历------";
    echo '</br>';
    $len = count($id_list);
    for($i=0; $i<$len; $i++){
        echo $id_list[$i];
    }

    echo '</br>';
    echo '</br>';
    echo "-----while循环遍历------";
    echo '</br>';
    $len = count($id_list);
    $i = 0;
    //这里i必须从0开始,并且while里面必须是++i;否则第一个元素不能被遍历到
    while ($i < $len) {
        echo $id_list[$i];
        ++$i;
    }

    echo '</br>';
    echo '</br>';
    echo "-----list()和each()循环遍历------";
    echo '</br>';
    while (list($key, $value) = each($address_list)) {
        echo $key.'--->'.$value;
        echo '</br>';
    }
    
    echo '</br>';
    echo '</br>';
    echo "-----var_dump()函数------";
    echo '</br>';
    var_dump($name_list);

?>