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PHP-Parameterübergabemethode 1 – Ajax

WBOYOriginal: 2016-07-29 09:15:051016Durchsuche

ajax ist „Asynchrones Javascript und XML“ (asynchrones JavaScript und XML), was sich auf eine Erstellung bezieht Webentwicklungstechnologie für interaktive Webanwendungen.

ajax = Asynchrones JavaScript und XML (eine Teilmenge der Standard Universal Markup Language).

ajax ist eine Technologie zur Erstellung schneller und dynamischer Webseiten.

Durch den Austausch einer kleinen Datenmenge mit dem Server im Hintergrund kann ajax dafür sorgen, dass Webseiten asynchron aktualisiert werden. Das bedeutet, dass Teile einer Webseite aktualisiert werden können, ohne dass die gesamte Seite neu geladen werden muss.

Herkömmliche Webseiten (ohne Verwendung von Ajax) müssen die gesamte Webseite neu laden, wenn der Inhalt aktualisiert werden muss. Asynchrone Anfrage (XMLHttpRequestObject), teilweise Aktualisierung (im Wesentlichen js dom)

Ajax wird auch verwendet, um automatisch zu bestimmen, ob der Benutzername beim Ausfüllen des Formulars wiederholt wird , beispielsweise wenn Sie SchreibenBlogWährend des Schreibens startet Ihr Computer plötzlich neu und Sie können die Hälfte von dem, was Sie geschrieben haben, wiederherstellen.

Get wird zum Abrufen von Daten verwendet. Die in der URL enthaltene Anforderung ist unbegrenzt und wird zum Ändern des Serverinhalts verwendet.

get ist eine sichere Anfrage und muss sicherstellen, dass die Informationen nicht geändert werden.

1. ajax wird im Allgemeinen für die aktuelle Seite verwendet und implementiert keine Seitensprünge

2. ajax Ende: Anleitung asynchron überwachen Wie sieht es mit dem Status auf der Serverseite aus? Abhören des readystate-Attributs durch onreadystatechange

request.onreadystatechange = function() {

<span>if (request.readyState===4) {</span>

0: Die Anfrage ist nicht initialisiert (open() wurde noch nicht aufgerufen) .
1: Die Anfrage wurde erstellt, aber noch nicht gesendet (send() wurde noch nicht aufgerufen).
2: Die Anfrage wurde gesendet und wird verarbeitet (normalerweise können die Inhaltsheader jetzt aus der Antwort entnommen werden).
3: Die Anfrage wird verarbeitet; normalerweise sind einige Daten in der Antwort verfügbar, aber der Server hat die Generierung der Antwort noch nicht abgeschlossen.
4: Die Antwort ist vollständig; Sie können die Antwort des Servers abrufen und verwenden.

Im Allgemeinen wird die entsprechende Operation ausgeführt, nachdem festgestellt wurde, dass sie gleich 4 ist.

Beachten Sie jedoch, dass sich dies vom Status der Anfrage unterscheidet.

Zum Beispiel bedeutet „readystate=4“, aber „status=404“, dass die Antwort abgeschlossen ist, der Inhalt der Antwort jedoch die Datei ist wurde nicht gefunden

Im Allgemeinen besteht die Methode darin, den Inhalt zurückzugeben, wenn ==200, und andernfalls den Tonfehler anzuzeigen.

Beachten Sie, dass Sie in der Post-Anfrage die URL festlegen müssen, um die URL zu kodieren und zu dekodieren, andernfalls wird das Ergebnis nicht korrekt ausgegeben

request.setRequestHeader("Content-type ","application/x -www-form-urlencoded");

Aber es gibt ein Problem mit der URL-Dekodierung. Da das Pluszeichen bei der URL-Kodierung automatisch in ein Leerzeichen dekodiert wird, wird dies & der Fall sein in einen variablen Konnektor dekodiert, also wenn diese Zeichen transkodiert werden müssen

(Ich bin auf dieses Problem gestoßen, als ich die URL zum Hochladen von Bildern auf die Leinwand erstellt habe)

Pic = Pic.replace(/ /g, "+");
Pic = Pic.replace(/&/g, "&");

3. Der Server gibt die Schnittstelle über Echo zurück. (Tipp: Der integrierte Browser von zendstudio zeigt immer die letzte Seite für die

Ajax

-Seite an, also führen Sie ihn stattdessen in einem externen Browser aus. Präferenz-Einstellung im Allgemeinen -Webbrowser. )

Wenn Sie nur eine einfache Zeile zurückgeben, kann Jason bequemer Daten mit unterschiedlichen Schlüsselwerten zurückgeben.

<span> 1</span><span><!</span><span>DOCTYPE HTML</span><span>></span><span> 2</span><span><</span><span>html</span><span>></span><span> 3</span><span><</span><span>head</span><span>></span><span> 4</span><span><</span><span>meta </span><span>http-equiv</span><span>="Content-Type"</span><span> content</span><span>="text/html; charset=utf-8"</span><span>></span><span> 5</span><span><</span><span>title</span><span>></span>Demo<span></</span><span>title</span><span>></span><span> 6</span><span><</span><span>style</span><span>></span><span> 7</span><span>body, input, select, button, h1 </span><span>{</span><span> 8</span><span>    font-size</span><span>:</span><span> 28px</span><span>;</span><span> 9</span><span>    line-height</span><span>:</span><span>1.7</span><span>;</span><span>10</span><span>}</span><span>11</span><span></</span><span>style</span><span>></span><span>12</span><span></</span><span>head</span><span>></span><span>13</span><span>14</span><span><</span><span>body</span><span>></span><span>15</span><span>16</span><span><</span><span>h1</span><span>></span>员工查询<span></</span><span>h1</span><span>></span><span>17</span><span>18</span><span><</span><span>label</span><span>></span>请输入员工编号：<span></</span><span>label</span><span>></span><span>19</span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="keyword"</span><span>/></span><span>20</span><span><</span><span>button </span><span>id</span><span>="search"</span><span>></span>查询<span></</span><span>button</span><span>></span><span>21</span><span><</span><span>p </span><span>id</span><span>="searchResult"</span><span>></</span><span>p</span><span>></span><span>22</span><span>23</span><span><</span><span>h1</span><span>></span>员工新建<span></</span><span>h1</span><span>></span><span>24</span><span><</span><span>label</span><span>></span>请输入员工姓名：<span></</span><span>label</span><span>></span><span>25</span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffName"</span><span>/><</span><span>br</span><span>></span><span>26</span><span><</span><span>label</span><span>></span>请输入员工编号：<span></</span><span>label</span><span>></span><span>27</span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffNumber"</span><span>/><</span><span>br</span><span>></span><span>28</span><span><</span><span>label</span><span>></span>请选择员工性别：<span></</span><span>label</span><span>></span><span>29</span><span><</span><span>select </span><span>id</span><span>="staffSex"</span><span>></span><span>30</span><span><</span><span>option</span><span>></span>女<span></</span><span>option</span><span>></span><span>31</span><span><</span><span>option</span><span>></span>男<span></</span><span>option</span><span>></span><span>32</span><span></</span><span>select</span><span>><</span><span>br</span><span>></span><span>33</span><span><</span><span>label</span><span>></span>请输入员工职位：<span></</span><span>label</span><span>></span><span>34</span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffJob"</span><span>/><</span><span>br</span><span>></span><span>35</span><span><</span><span>button </span><span>id</span><span>="save"</span><span>></span>保存<span></</span><span>button</span><span>></span><span>36</span><span><</span><span>p </span><span>id</span><span>="createResult"</span><span>></</span><span>p</span><span>></span><span>37</span><span>38</span><span><</span><span>script</span><span>></span><span>39</span><span>document.getElementById(</span><span>"</span><span>search</span><span>"</span><span>).onclick </span><span>=</span><span>function</span><span>() { 
</span><span>40</span><span>var</span><span> request </span><span>=</span><span>new</span><span> XMLHttpRequest();
</span><span>41</span><span>    request.open(</span><span>"</span><span>GET</span><span>"</span><span>, </span><span>"</span><span>serverjson.php?number=</span><span>"</span><span>+</span><span> document.getElementById(</span><span>"</span><span>keyword</span><span>"</span><span>).value);
</span><span>42</span><span>    request.send();
</span><span>43</span><span>    request.onreadystatechange </span><span>=</span><span>function</span><span>() {
</span><span>44</span><span>if</span><span> (request.readyState</span><span>===</span><span>4</span><span>) {
</span><span>45</span><span>if</span><span> (request.status</span><span>===</span><span>200</span><span>) { </span><span>//</span><span>不同的status在<strong>百度</strong>可以找到</span><span>46</span><span>var</span><span> data </span><span>=</span><span> JSON.parse(request.responseText);</span><span>//</span><span>json.parse!</span><span>47</span><span>if</span><span> (data.success) { </span><span>//</span><span>注意seccess也返回jason的一个键值</span><span>48</span><span>                    document.getElementById(</span><span>"</span><span>searchResult</span><span>"</span><span>).innerHTML </span><span>=</span><span> data.msg;</span><span>//</span><span>json中的msg键值</span><span>49</span><span>                } </span><span>else</span><span> {
</span><span>50</span><span>                    document.getElementById(</span><span>"</span><span>searchResult</span><span>"</span><span>).innerHTML </span><span>=</span><span>"</span><span>出现错误：</span><span>"</span><span>+</span><span> data.msg;
</span><span>51</span><span>                }
</span><span>52</span><span>            } </span><span>else</span><span> {<br></span><span>53</span><span>                alert(</span><span>"</span><span>发生错误：</span><span>"</span><span>+</span><span> request.status);
</span><span>54</span><span>            }
</span><span>55</span><span>        } 
</span><span>56</span><span>    }
</span><span>57</span><span>}
</span><span>58</span><span>59</span><span>document.getElementById(</span><span>"</span><span>save</span><span>"</span><span>).onclick </span><span>=</span><span>function</span><span>() { 
</span><span>60</span><span>var</span><span> request </span><span>=</span><span>new</span><span> XMLHttpRequest();
</span><span>61</span><span>    request.open(</span><span>"</span><span>POST</span><span>"</span><span>, </span><span>"</span><span>serverjson.php</span><span>"</span><span>);
</span><span>62</span><span>var</span><span> data </span><span>=</span><span>"</span><span>name=</span><span>"</span><span>+</span><span> document.getElementById(</span><span>"</span><span>staffName</span><span>"</span><span>).value 
</span><span>63</span><span>+</span><span>"</span><span>&number=</span><span>"</span><span>+</span><span> document.getElementById(</span><span>"</span><span>staffNumber</span><span>"</span><span>).value 
</span><span>64</span><span>+</span><span>"</span><span>&sex=</span><span>"</span><span>+</span><span> document.getElementById(</span><span>"</span><span>staffSex</span><span>"</span><span>).value 
</span><span>65</span><span>+</span><span>"</span><span>&job=</span><span>"</span><span>+</span><span> document.getElementById(</span><span>"</span><span>staffJob</span><span>"</span><span>).value;
</span><span>66</span><span>    request.setRequestHeader(</span><span>"</span><span>Content-type</span><span>"</span><span>,</span><span>"</span><span>application/x-www-form-urlencoded</span><span>"</span><span>);
</span><span>67</span><span>    request.send(data);
</span><span>68</span><span>    request.onreadystatechange </span><span>=</span><span>function</span><span>() {
</span><span>69</span><span>if</span><span> (request.readyState</span><span>===</span><span>4</span><span>) {
</span><span>70</span><span>if</span><span> (request.status</span><span>===</span><span>200</span><span>) { 
</span><span>71</span><span>var</span><span> data </span><span>=</span><span> JSON.parse(request.responseText);
</span><span>72</span><span>if</span><span> (data.success) { 
</span><span>73</span><span>                    document.getElementById(</span><span>"</span><span>createResult</span><span>"</span><span>).innerHTML </span><span>=</span><span> data.msg;
</span><span>74</span><span>                } </span><span>else</span><span> {
</span><span>75</span><span>                    document.getElementById(</span><span>"</span><span>createResult</span><span>"</span><span>).innerHTML </span><span>=</span><span>"</span><span>出现错误：</span><span>"</span><span>+</span><span> data.msg;
</span><span>76</span><span>                }
</span><span>77</span><span>            } </span><span>else</span><span> {
</span><span>78</span><span>                alert(</span><span>"</span><span>发生错误：</span><span>"</span><span>+</span><span> request.status);
</span><span>79</span><span>            }
</span><span>80</span><span>        } 
</span><span>81</span><span>    }
</span><span>82</span><span>}
</span><span>83</span><span></</span><span>script</span><span>></span><span>84</span><span></</span><span>body</span><span>></span><span>85</span><span></</span><span>html</span><span>></span>

3. Antwortservercode serverjason.php

<?<span>php
</span><span>//</span><span>设置页面内容是html编码格式是utf-8</span><span>header</span>("Content-Type: text/plain;charset=utf-8"<span>); 
</span><span>//</span><span>header("Content-Type: application/json;charset=utf-8"); 
//header("Content-Type: text/xml;charset=utf-8"); 
//header("Content-Type: text/html;charset=utf-8"); 
//header("Content-Type: application/javascript;charset=utf-8"); 

//定义一个多维数组，包含员工的信息，每条员工信息为一个数组</span><span>$staff</span> = <span>array</span><span>    (
        </span><span>array</span>("name" => "洪七", "number" => "101", "sex" => "男", "job" => "总经理"),
        <span>array</span>("name" => "郭靖", "number" => "102", "sex" => "男", "job" => "开发工程师"),
        <span>array</span>("name" => "黄蓉", "number" => "103", "sex" => "女", "job" => "产品经理"<span>)
    );

</span><span>//</span><span>判断如果是get请求，则进行搜索；如果是POST请求，则进行新建
//$_SERVER是一个超<strong>全局变量</strong>，在一个脚本的全部作用域中都可用，不用使用global关键字
//$_SERVER["REQUEST_METHOD"]返回访问页面使用的请求方法</span><span>if</span> (<span>$_SERVER</span>["REQUEST_METHOD"] == "GET"<span>) {
    search();
} </span><span>elseif</span> (<span>$_SERVER</span>["REQUEST_METHOD"] == "POST"<span>){
    create();
}

</span><span>//</span><span>通过员工编号搜索员工</span><span>function</span><span> search(){
    </span><span>//</span><span>检查是否有员工编号的参数
    //isset检测变量是否设置；empty判断值为否为空
    //超<strong>全局变量</strong> $_GET 和 $_POST 用于收集表单数据</span><span>if</span> (!<span>isset</span>(<span>$_GET</span>["number"]) || <span>empty</span>(<span>$_GET</span>["number"<span>])) {
        </span><span>echo</span> '{"success":false,"msg":"参数错误"}';<span>//</span><span>jason格式</span><span>return</span><span>;
    }
    </span><span>//</span><span>函数之外声明的变量拥有 Global 作用域，只能在函数以外进行访问。
    //global 关键词用于访问函数内的<strong>全局变量</strong></span><span>global</span><span>$staff</span><span>;
    </span><span>//</span><span>获取number参数</span><span>$number</span> = <span>$_GET</span>["number"<span>];
    </span><span>$result</span> = '{"success":false,"msg":"没有找到员工。"}'<span>;
    
    </span><span>//</span><span>遍历$staff多维数组，查找key值为number的员工是否存在，如果存在，则修改返回结果</span><span>foreach</span> (<span>$staff</span><span>as</span><span>$value</span><span>) {
        </span><span>if</span> (<span>$value</span>["number"] == <span>$number</span><span>) {
            </span><span>$result</span> = '{"success":true,"msg":"找到员工：员工编号：' . <span>$value</span>["number"] . 
                            '，员工姓名：' . <span>$value</span>["name"] . 
                            '，员工性别：' . <span>$value</span>["sex"] . 
                            '，员工职位：' . <span>$value</span>["job"] . '"}';<span>//</span><span>jason格式</span><span>break</span><span>;
        }
    }
    </span><span>echo</span><span>$result</span><span>;
}

</span><span>//</span><span>创建员工</span><span>function</span><span> create(){
    </span><span>//</span><span>判断信息是否填写完全</span><span>if</span> (!<span>isset</span>(<span>$_POST</span>["name"]) || <span>empty</span>(<span>$_POST</span>["name"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["number"]) || <span>empty</span>(<span>$_POST</span>["number"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["sex"]) || <span>empty</span>(<span>$_POST</span>["sex"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["job"]) || <span>empty</span>(<span>$_POST</span>["job"<span>])) {
        </span><span>echo</span> '{"success":false,"msg":"参数错误，员工信息填写不全"}'<span>;
        </span><span>return</span><span>;
    }
    </span><span>//</span><span>TODO: 获取POST表单数据并保存到数据库
    
    //提示保存成功</span><span>echo</span> '{"success":true,"msg":"员工：' . <span>$_POST</span>["name"] . ' 信息保存成功！"}'<span>;
}

</span>?>

4. Das Folgende ist die Form von jQuery

<span><!</span><span>DOCTYPE HTML</span><span>></span><span><</span><span>html</span><span>></span><span><</span><span>head</span><span>></span><span><</span><span>meta </span><span>http-equiv</span><span>="Content-Type"</span><span> content</span><span>="text/html; charset=utf-8"</span><span>></span><span><</span><span>title</span><span>></span>Demo<span></</span><span>title</span><span>></span><span><</span><span>style</span><span>></span><span>body, input, select, button, h1 </span><span>{</span><span>    font-size</span><span>:</span><span> 28px</span><span>;</span><span>    line-height</span><span>:</span><span>1.7</span><span>;</span><span>}</span><span></</span><span>style</span><span>></span><span></</span><span>head</span><span>></span><span><</span><span>body</span><span>></span><span><</span><span>h1</span><span>></span>员工查询<span></</span><span>h1</span><span>></span><span><</span><span>label</span><span>></span>请输入员工编号：<span></</span><span>label</span><span>></span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="keyword"</span><span>/></span><span><</span><span>button </span><span>id</span><span>="search"</span><span>></span>查询<span></</span><span>button</span><span>></span><span><</span><span>p </span><span>id</span><span>="searchResult"</span><span>></</span><span>p</span><span>></span><span><</span><span>h1</span><span>></span>员工新建<span></</span><span>h1</span><span>></span><span><</span><span>label</span><span>></span>请输入员工姓名：<span></</span><span>label</span><span>></span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffName"</span><span>/><</span><span>br</span><span>></span><span><</span><span>label</span><span>></span>请输入员工编号：<span></</span><span>label</span><span>></span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffNumber"</span><span>/><</span><span>br</span><span>></span><span><</span><span>label</span><span>></span>请选择员工性别：<span></</span><span>label</span><span>></span><span><</span><span>select </span><span>id</span><span>="staffSex"</span><span>></span><span><</span><span>option</span><span>></span>女<span></</span><span>option</span><span>></span><span><</span><span>option</span><span>></span>男<span></</span><span>option</span><span>></span><span></</span><span>select</span><span>><</span><span>br</span><span>></span><span><</span><span>label</span><span>></span>请输入员工职位：<span></</span><span>label</span><span>></span><span><</span><span>input </span><span>type</span><span>="text"</span><span> id</span><span>="staffJob"</span><span>/><</span><span>br</span><span>></span><span><</span><span>button </span><span>id</span><span>="save"</span><span>></span>保存<span></</span><span>button</span><span>></span><span><</span><span>p </span><span>id</span><span>="createResult"</span><span>></</span><span>p</span><span>></span><span><</span><span>script </span><span>src</span><span>="http://apps.bdimg.com/libs/jquery/1.11.1/jquery.js"</span><span>></</span><span>script</span><span>></span><span><</span><span>script</span><span>></span><span>$(document).ready(</span><span>function</span><span>(){ 
    $(</span><span>"</span><span>#search</span><span>"</span><span>).click(</span><span>function</span><span>(){ 
        $.<strong>ajax</strong>({ 
            type: </span><span>"</span><span>GET</span><span>"</span><span>,     
            url: </span><span>"</span><span>serverjson2.php?number=</span><span>"</span><span>+</span><span> $(</span><span>"</span><span>#keyword</span><span>"</span><span>).val(),
            dataType: </span><span>"</span><span>json</span><span>"</span><span>,
            success: </span><span>function</span><span>(data) {
                </span><span>if</span><span> (data.success) { 
                    $(</span><span>"</span><span>#searchResult</span><span>"</span><span>).html(data.msg);
                } </span><span>else</span><span> {
                    $(</span><span>"</span><span>#searchResult</span><span>"</span><span>).html(</span><span>"</span><span>出现错误：</span><span>"</span><span>+</span><span> data.msg);
                }  
            },
            error: </span><span>function</span><span>(jqXHR){     
               alert(</span><span>"</span><span>发生错误：</span><span>"</span><span>+</span><span> jqXHR.status);  
            },     
        });
    });
    
    $(</span><span>"</span><span>#save</span><span>"</span><span>).click(</span><span>function</span><span>(){ 
        $.<strong>ajax</strong>({ 
            type: </span><span>"</span><span>POST</span><span>"</span><span>,     
            url: </span><span>"</span><span>serverjson.php</span><span>"</span><span>,
            data: {
                name: $(</span><span>"</span><span>#staffName</span><span>"</span><span>).val(), 
                number: $(</span><span>"</span><span>#staffNumber</span><span>"</span><span>).val(), 
                sex: $(</span><span>"</span><span>#staffSex</span><span>"</span><span>).val(), 
                job: $(</span><span>"</span><span>#staffJob</span><span>"</span><span>).val()
            },
            dataType: </span><span>"</span><span>json</span><span>"</span><span>,
            success: </span><span>function</span><span>(data){
                </span><span>if</span><span> (data.success) { 
                    $(</span><span>"</span><span>#createResult</span><span>"</span><span>).html(data.msg);
                } </span><span>else</span><span> {
                    $(</span><span>"</span><span>#createResult</span><span>"</span><span>).html(</span><span>"</span><span>出现错误：</span><span>"</span><span>+</span><span> data.msg);
                }  
            },
            error: </span><span>function</span><span>(jqXHR){     
               alert(</span><span>"</span><span>发生错误：</span><span>"</span><span>+</span><span> jqXHR.status);  
            },     
        });
    });
});
</span><span></</span><span>script</span><span>></span><span></</span><span>body</span><span>></span><span></</span><span>html</span><span>></span>

<?<span>php
</span><span>//</span><span>设置页面内容是html编码格式是utf-8
//header("Content-Type: text/plain;charset=utf-8"); </span><span>header</span>('Access-Control-Allow-Origin:*'<span>);
</span><span>header</span>('Access-Control-Allow-Methods:POST,GET'<span>);
</span><span>header</span>('Access-Control-Allow-Credentials:true'<span>); 
</span><span>header</span>("Content-Type: application/json;charset=utf-8"<span>); 
</span><span>//</span><span>header("Content-Type: text/xml;charset=utf-8"); 
//header("Content-Type: text/html;charset=utf-8"); 
//header("Content-Type: application/javascript;charset=utf-8"); 

//定义一个多维数组，包含员工的信息，每条员工信息为一个数组</span><span>$staff</span> = <span>array</span><span>    (
        </span><span>array</span>("name" => "洪七", "number" => "101", "sex" => "男", "job" => "总经理"),
        <span>array</span>("name" => "郭靖", "number" => "102", "sex" => "男", "job" => "开发工程师"),
        <span>array</span>("name" => "黄蓉", "number" => "103", "sex" => "女", "job" => "产品经理"<span>)
    );

</span><span>//</span><span>判断如果是get请求，则进行搜索；如果是POST请求，则进行新建
//$_SERVER是一个超<strong>全局变量</strong>，在一个脚本的全部作用域中都可用，不用使用global关键字
//$_SERVER["REQUEST_METHOD"]返回访问页面使用的请求方法</span><span>if</span> (<span>$_SERVER</span>["REQUEST_METHOD"] == "GET"<span>) {
    search();
} </span><span>elseif</span> (<span>$_SERVER</span>["REQUEST_METHOD"] == "POST"<span>){
    create();
}

</span><span>//</span><span>通过员工编号搜索员工</span><span>function</span><span> search(){
    </span><span>//</span><span>检查是否有员工编号的参数
    //isset检测变量是否设置；empty判断值为否为空
    //超<strong>全局变量</strong> $_GET 和 $_POST 用于收集表单数据</span><span>if</span> (!<span>isset</span>(<span>$_GET</span>["number"]) || <span>empty</span>(<span>$_GET</span>["number"<span>])) {
        </span><span>echo</span> '{"success":false,"msg":"参数错误"}'<span>;
        </span><span>return</span><span>;
    }
    </span><span>//</span><span>函数之外声明的变量拥有 Global 作用域，只能在函数以外进行访问。
    //global 关键词用于访问函数内的<strong>全局变量</strong></span><span>global</span><span>$staff</span><span>;
    </span><span>//</span><span>获取number参数</span><span>$number</span> = <span>$_GET</span>["number"<span>];
    </span><span>$result</span> = '{"success":false,"msg":"没有找到员工。"}'<span>;
    
    </span><span>//</span><span>遍历$staff多维数组，查找key值为number的员工是否存在，如果存在，则修改返回结果</span><span>foreach</span> (<span>$staff</span><span>as</span><span>$value</span><span>) {
        </span><span>if</span> (<span>$value</span>["number"] == <span>$number</span><span>) {
            </span><span>$result</span> = '{"success":true,"msg":"找到员工：员工编号：' . <span>$value</span>["number"] . 
                            '，员工姓名：' . <span>$value</span>["name"] . 
                            '，员工性别：' . <span>$value</span>["sex"] . 
                            '，员工职位：' . <span>$value</span>["job"] . '"}'<span>;
            </span><span>break</span><span>;
        }
    }
    </span><span>echo</span><span>$result</span><span>;
}

</span><span>//</span><span>创建员工</span><span>function</span><span> create(){
    </span><span>//</span><span>判断信息是否填写完全</span><span>if</span> (!<span>isset</span>(<span>$_POST</span>["name"]) || <span>empty</span>(<span>$_POST</span>["name"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["number"]) || <span>empty</span>(<span>$_POST</span>["number"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["sex"]) || <span>empty</span>(<span>$_POST</span>["sex"<span>])
        </span>|| !<span>isset</span>(<span>$_POST</span>["job"]) || <span>empty</span>(<span>$_POST</span>["job"<span>])) {
        </span><span>echo</span> '{"success":false,"msg":"参数错误，员工信息填写不全"}'<span>;
        </span><span>return</span><span>;
    }
    </span><span>//</span><span>TODO: 获取POST表单数据并保存到数据库
    
    //提示保存成功</span><span>echo</span> '{"success":true,"msg":"员工：' . <span>$_POST</span>["name"] . ' 信息保存成功！"}'<span>;
}

</span>?>

Das Obige stellt die PHP-Parameterübergabemethode 1-ajax vor, einschließlich des relevanten Inhalts. Ich hoffe, dass es für Freunde hilfreich ist, die sich für PHP-Tutorials interessieren.

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