jquery ajax php+mysql 无刷新分页 详细实例_PHP教程
最近在接触jquery和ajax，当前项目也会用到分页，为了用户体验更好一些，就准备用无刷新分页，这个demo很适合新手学习查看，写的比较清晰，话不多说，直接上代码吧。
首先是html页面，index.html，代码如下：
<span 1</span> <span <!</span><span DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"</span><span ></span>
<span 2</span> <span <</span><span html </span><span xmlns</span><span ="http://www.w3.org/1999/xhtml"</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>php+mysql+ajax+jquery分页<span </</span><span title</span><span ></span>
<span 6</span>
<span 7</span> <span <</span><span script </span><span type</span><span ="text/javascript"</span><span src</span><span ="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"</span><span ></</span><span script</span><span ></span>
<span 8</span> <span <</span><span script </span><span type</span><span ="text/javascript"</span><span src</span><span ="ajaxPager.js"</span><span ></</span><span script</span><span ></span>
<span 9</span> <span <</span><span style</span><span ></span>
<span 10</span> <span #main</span><span {</span>
<span 11</span> <span width</span><span :</span><span 980px</span><span ;</span>
<span 12</span> <span margin</span><span :</span><span 0px auto</span><span ;</span>
<span 13</span> <span }</span>
<span 14</span> <span ul
</span><span 15</span> <span {</span>
<span 16</span> <span list-style</span><span :</span><span none</span><span ;</span>
<span 17</span> <span margin</span><span :</span><span 0px</span><span ;</span>
<span 18</span> <span }</span>
<span 19</span> <span #list li</span><span {</span>
<span 20</span> <span width</span><span :</span><span 220px</span><span ;</span>
<span 21</span> <span height</span><span :</span><span 280px</span><span ;</span>
<span 22</span> <span float</span><span :</span><span left</span><span ;</span>
<span 23</span> <span margin-left</span><span :</span><span 10px</span><span ;</span>
<span 24</span> <span }</span>
<span 25</span> <span .pager .cur </span><span {</span>
<span 26</span> <span border-top-color</span><span :</span><span rgb(255, 255, 255)</span><span ;</span>
<span 27</span> <span border</span><span :</span><span 1px solid #fff</span><span ;</span>
<span 28</span> <span background</span><span :</span><span 0</span><span ;</span>
<span 29</span> <span font-weight</span><span :</span><span bold</span><span ;</span>
<span 30</span> <span color</span><span :</span><span #000</span><span ;</span>
<span 31</span> <span }</span>
<span 32</span> <span .pager a, .pager span </span><span {</span>
<span 33</span> <span margin-top</span><span :</span><span 5px</span><span ;</span>
<span 34</span> <span }</span>
<span 35</span> <span .pager a, .pager span </span><span {</span>
<span 36</span> <span background</span><span :</span><span none repeat scroll 0 0 #fff</span><span ;</span>
<span 37</span> <span border</span><span :</span><span 1px solid #e7ecf0</span><span ;</span>
<span 38</span> <span color</span><span :</span><span #0000cd</span><span ;</span>
<span 39</span> <span float</span><span :</span><span left</span><span ;</span>
<span 40</span> <span height</span><span :</span><span 22px</span><span ;</span>
<span 41</span> <span line-height</span><span :</span><span 22px</span><span ;</span>
<span 42</span> <span margin-right</span><span :</span><span 5px</span><span ;</span>
<span 43</span> <span overflow</span><span :</span><span hidden</span><span ;</span>
<span 44</span> <span text-align</span><span :</span><span center</span><span ;</span>
<span 45</span> <span text-decoration</span><span :</span><span none</span><span ;</span>
<span 46</span> <span width</span><span :</span><span auto</span><span ;</span>
<span 47</span> <span padding</span><span :</span><span 0 8px</span><span ;</span>
<span 48</span> <span }</span>
<span 49</span> <span .pager span </span><span {</span>
<span 50</span> <span background</span><span :</span><span none repeat scroll 0 0 #fff</span><span ;</span>
<span 51</span> <span border</span><span :</span><span 1px solid #e7ecf0</span><span ;</span>
<span 52</span> <span color</span><span :</span><span #0000cd</span><span ;</span>
<span 53</span> <span float</span><span :</span><span left</span><span ;</span>
<span 54</span> <span height</span><span :</span><span 22px</span><span ;</span>
<span 55</span> <span line-height</span><span :</span><span 22px</span><span ;</span>
<span 56</span> <span margin-right</span><span :</span><span 5px</span><span ;</span>
<span 57</span> <span overflow</span><span :</span><span hidden</span><span ;</span>
<span 58</span> <span text-align</span><span :</span><span center</span><span ;</span>
<span 59</span> <span text-decoration</span><span :</span><span none</span><span ;</span>
<span 60</span> <span width</span><span :</span><span auto</span><span ;</span>
<span 61</span> <span padding</span><span :</span><span 0 8px</span><span ;</span>
<span 62</span> <span }</span>
<span 63</span> <span .pager </span><span {</span>
<span 64</span> <span border-top</span><span :</span><span 0</span><span ;</span>
<span 65</span> <span padding</span><span :</span><span 12px 0 30px 15px</span><span ;</span>
<span 66</span> <span float</span><span :</span><span left</span><span ;</span>
<span 67</span> <span }</span>
<span 68</span> <span .clearfix </span><span {</span>
<span 69</span> <span display</span><span :</span><span block</span><span ;</span>
<span 70</span> <span }</span>
<span 71</span> <span .pager </span><span {</span>
<span 72</span> <span float</span><span :</span><span left</span><span ;</span>
<span 73</span> <span font-family</span><span :</span><span Arial</span><span ;</span>
<span 74</span> <span font-size</span><span :</span><span 13px</span><span ;</span>
<span 75</span> <span }</span>
<span 76</span> <span .clearfix </span><span {</span>
<span 77</span> <span zoom</span><span :</span><span 1</span><span ;</span>
<span 78</span> <span }</span>
<span 79</span> <span </</span><span style</span><span ></span>
<span 80</span>
<span 81</span>
<span 82</span> <span </</span><span head</span><span ></span>
<span 83</span>
<span 84</span> <span <</span><span body</span><span ></span>
<span 85</span>
<span 86</span>
<span 87</span> <span <</span><span div </span><span id</span><span ="main"</span><span ></span>
<span 88</span> <span <</span><span div </span><span id</span><span ="pagecount"</span><span class</span><span ="pager clearfix"</span><span ></</span><span div</span><span ><</span><span div </span><span id</span><span ="loading"</span><span ></</span><span div</span><span ></span>
<span 89</span> <span <</span><span br </span><span /></span>
<span 90</span> <span <</span><span br </span><span /></span>
<span 91</span> <span <</span><span br </span><span /></span>
<span 92</span> <span <</span><span br </span><span /></span>
<span 93</span> <span <</span><span div </span><span id</span><span ="list"</span><span ></span>
<span 94</span> <span <</span><span ul</span><span ></</span><span ul</span><span ></span>
<span 95</span> <span </</span><span div</span><span ></span>
<span 96</span> <span </</span><span div</span><span ></span>
<span 97</span> <span </</span><span body</span><span ></span>
<span 98</span> <span </</span><span html</span><span ></span>
样式我随便写的，毕竟我样式写的很差，大家可以自己换样式的。
然后就是js代码了，ajaxPager.js，代码如下：
<span 1</span> <span var</span> curPage = 1; <span //</span><span 当前页码</span>
<span 2</span> <span var</span><span total,pageSize,totalPage;
</span><span 3</span> <span //</span><span 获取数据</span>
<span 4</span> <span function</span><span getData(page){
</span><span 5</span> <span $.ajax({
</span><span 6</span> type: 'POST'<span ,
</span><span 7</span> url: 'pages.php'<span ,
</span><span 8</span> data: {'pageNum':page-1<span },
</span><span 9</span> dataType:'json'<span ,
</span><span 10</span> beforeSend:<span function</span><span (){
</span><span 11</span> $("#loading").html("<img id='loadin'g src='loading.gif' alt="jquery ajax php+mysql 无刷新分页 详细实例_PHP教程" >"<span );
</span><span 12</span> <span },
</span><span 13</span> success:<span function</span><span (json){
</span><span 14</span> $("#loading").html(""<span );
</span><span 15</span> $("#list ul"<span ).empty();
</span><span 16</span> total = json.total; <span //</span><span 总记录数</span>
<span 17</span> pageSize = json.pageSize; <span //</span><span 每页显示条数</span>
<span 18</span> curPage = page; <span //</span><span 当前页</span>
<span 19</span> totalPage = json.totalPage; <span //</span><span 总页数</span>
<span 20</span> <span var</span> li = ""<span ;
</span><span 21</span> <span var</span> list =<span json.list;
</span><span 22</span> $.each(list,<span function</span>(index,array){ <span //</span><span 遍历json数据列</span>
<span 23</span> li += "<li><a href='#'><img src='"+array['pic']+"' alt="jquery ajax php+mysql 无刷新分页 详细实例_PHP教程" ></a><p>"+array['title'].substring(0,10)+"</p></li>"<span ;
</span><span 24</span> <span });
</span><span 25</span> $("#list ul"<span ).append(li);
</span><span 26</span> <span },
</span><span 27</span> complete:<span function</span>(){ <span //</span><span 生成分页条</span>
<span 28</span> <span getPageBar();
</span><span 29</span> <span },
</span><span 30</span> error:<span function</span><span (){
</span><span 31</span> alert("数据加载失败"<span );
</span><span 32</span> <span }
</span><span 33</span> <span });
</span><span 34</span> <span }
</span><span 35</span>
<span 36</span> <span //</span><span 获取分页条</span>
<span 37</span> <span function</span><span getPageBar(){
</span><span 38</span> <span //</span><span 页码大于最大页数</span>
<span 39</span> <span if</span>(curPage>totalPage) curPage=<span totalPage;
</span><span 40</span> <span //</span><span 页码小于1</span>
<span 41</span> <span if</span>(curPage<1) curPage=1<span ;
</span><span 42</span> pageStr = "<span class=''>共"+total+"条"+curPage+"/"+totalPage+"</span>"<span ;
</span><span 43</span>
<span 44</span> <span //</span><span 如果是第一页</span>
<span 45</span> <span if</span>(totalPage<=4<span )
</span><span 46</span> <span {
</span><span 47</span> <span if</span>(curPage==1<span ){
</span><span 48</span> pageStr += "<span class='cur'>1</span>"<span ;
</span><span 49</span> <span for</span>(<span var</span> i=2;i<=totalPage;i++<span )
</span><span 50</span> <span {
</span><span 51</span> pageStr += "<a href='javascript:void(0)' rel='"+i+"'>"+i+"</a>"<span ;
</span><span 52</span> <span }
</span><span 53</span> }<span else</span><span {
</span><span 54</span> pageStr += "<a href='javascript:void(0)' rel='1'><<</a><a href='javascript:void(0)' rel='"+(curPage-1)+"'><</a>"<span ;
</span><span 55</span> <span for</span>(<span var</span> i=1;i<=totalPage;i++<span )
</span><span 56</span> <span {
</span><span 57</span> <span if</span>(i==<span curPage)
</span><span 58</span> <span {
</span><span 59</span> pageStr += "<span class='cur'>"+i+"</span>"
<span 60</span> <span }
</span><span 61</span> <span else</span>
<span 62</span> <span {
</span><span 63</span> pageStr += "<a href='javascript:void(0)' rel='"+i+"'>"+i+"</a>"<span ;
</span><span 64</span> <span }
</span><span 65</span> <span }
</span><span 66</span>
<span 67</span> <span }
</span><span 68</span> <span }
</span><span 69</span> <span else</span><span //</span><span 当页数大于5的时候就要这样显示1 2 3 4 ...</span>
<span 70</span> <span {
</span><span 71</span> <span if</span>(curPage<=3<span ){
</span><span 72</span> <span if</span>(curPage==1<span )
</span><span 73</span> <span {
</span><span 74</span> pageStr += "<span class='cur'>1</span>"<span ;
</span><span 75</span> <span }
</span><span 76</span> <span else</span>
<span 77</span> <span {
</span><span 78</span> pageStr += "<a href='javascript:void(0)' rel='1'><<</a><a href='javascript:void(0)' rel='"+(curPage-1)+"'><</a>"<span ;
</span><span 79</span> pageStr += "<span class='cur'><a href='javascript:void(0)' rel='1'>1</a></span>"<span ;
</span><span 80</span> <span }
</span><span 81</span> <span for</span>(<span var</span> i=2;i<=4;i++<span )
</span><span 82</span> <span {
</span><span 83</span> <span if</span>(i==<span curPage)
</span><span 84</span> <span {
</span><span 85</span> pageStr += "<span class='cur'>"+i+"</span>"
<span 86</span> <span }
</span><span 87</span> <span else</span>
<span 88</span> <span {
</span><span 89</span> pageStr += "<a href='javascript:void(0)' rel='"+i+"'>"+i+"</a>"<span ;
</span><span 90</span> <span }
</span><span 91</span> <span }
</span><span 92</span> pageStr += "<span class='cur'>...</span>"<span ;
</span><span 93</span> }<span else</span><span {
</span><span 94</span> pageStr += "<a href='javascript:void(0)' rel='1'><<</a><a href='javascript:void(0)' rel='"+(curPage-1)+"'><</a>"<span ;
</span><span 95</span> pageStr += "<span class='cur'>...</span>"<span ;
</span><span 96</span> <span if</span>(curPage>totalPage-2<span )
</span><span 97</span> <span {
</span><span 98</span> <span for</span>(<span var</span> i=totalPage-2;i<=totalPage;i++<span )
</span><span 99</span> <span {
</span><span 100</span> <span if</span>(i==<span curPage)
</span><span 101</span> <span {
</span><span 102</span> pageStr += "<span class='cur'>"+i+"</span>"
<span 103</span> <span }
</span><span 104</span> <span else</span>
<span 105</span> <span {
</span><span 106</span> pageStr += "<a href='javascript:void(0)' rel='"+i+"'>"+i+"</a>"<span ;
</span><span 107</span> <span }
</span><span 108</span> <span }
</span><span 109</span> <span }
</span><span 110</span> <span else</span>
<span 111</span> <span {
</span><span 112</span> pageStr += "<a href='javascript:void(0)' rel='"+(curPage-1)+"'>"+(curPage-1)+"</a>"<span ;
</span><span 113</span> pageStr += "<span class='cur'>"+curPage+"</span>"<span ;
</span><span 114</span> pageStr += "<a href='javascript:void(0)' rel='"+(parseInt(curPage)+1)+"'>"+(parseInt(curPage)+1)+"</a>"<span ;
</span><span 115</span> pageStr += "<span class='cur'>...</span>"<span ;
</span><span 116</span> <span }
</span><span 117</span> <span }
</span><span 118</span> <span }
</span><span 119</span> <span //</span><span 如果是最后页</span>
<span 120</span> <span if</span>(curPage>=<span totalPage){
</span><span 121</span> <span //</span><span pageStr += "<span>></span> <span>>></span>";</span>
<span 122</span> }<span else</span><span {
</span><span 123</span> pageStr += "<a href='javascript:void(0)' rel='"+(parseInt(curPage)+1)+"'>></a><a href='javascript:void(0)' rel='"+totalPage+"'>>></a>"<span ;
</span><span 124</span> <span }
</span><span 125</span>
<span 126</span> $("#pagecount"<span ).html(pageStr);
</span><span 127</span> <span }
</span><span 128</span>
<span 129</span> $(<span function</span><span (){
</span><span 130</span> getData(1<span );
</span><span 131</span> $("#pagecount a").live('click',<span function</span><span (){
</span><span 132</span> <span var</span> rel = $(<span this</span>).attr("rel"<span );
</span><span 133</span> <span if</span><span (rel){
</span><span 134</span> <span getData(rel);
</span><span 135</span> <span }
</span><span 136</span> <span });
</span><span 137</span> });
因为项目的需要，我这个页面页数显示只能显示几页，比如就这样 << < ... 5 6 7 ... > >>，要改显示的，就在ajaxPager.js里面改。
$.ajax({ 中url: 'pages.php'，处理就在pages.php中处理。那么就来看看pages.php中的代码：
<span 1</span> <?<span php
</span><span 2</span> <span include_once</span>('connect.php'<span );
</span><span 3</span>
<span 4</span> <span $page</span> = <span intval</span>(<span $_POST</span>['pageNum'<span ]);
</span><span 5</span>
<span 6</span> <span $result</span> = <span mysql_query</span>("select id from food"<span );
</span><span 7</span> <span $total</span> = <span mysql_num_rows</span>(<span $result</span>);<span //</span><span 总记录数</span>
<span 8</span>
<span 9</span> <span $pageSize</span> = 8; <span //</span><span 每页显示数</span>
<span 10</span> <span $totalPage</span> = <span ceil</span>(<span $total</span>/<span $pageSize</span>); <span //</span><span 总页数</span>
<span 11</span>
<span 12</span> <span $startPage</span> = <span $page</span>*<span $pageSize</span><span ;
</span><span 13</span> <span $arr</span>['total'] = <span $total</span><span ;
</span><span 14</span> <span $arr</span>['pageSize'] = <span $pageSize</span><span ;
</span><span 15</span> <span $arr</span>['totalPage'] = <span $totalPage</span><span ;
</span><span 16</span> <span $query</span> = <span mysql_query</span>("select id,title,pic from food order by id asc limit <span $startPage</span>,<span $pageSize</span>"<span );
</span><span 17</span> <span while</span>(<span $row</span>=<span mysql_fetch_array</span>(<span $query</span><span )){
</span><span 18</span> <span $arr</span>['list'][] = <span array</span><span (
</span><span 19</span> 'id' => <span $row</span>['id'],
<span 20</span> 'title' => <span $row</span>['title'],
<span 21</span> 'pic' => <span $row</span>['pic'],
<span 22</span> <span );
</span><span 23</span> <span }
</span><span 24</span> <span //</span><span print_r($arr);</span>
<span 25</span> <span echo</span> json_encode(<span $arr</span><span );
</span><span 26</span> ?>
上面当然还有数据库连接了啦，这个应该很简单吧，还是贴出来connect.php：
<span 1</span> <?<span php
</span><span 2</span> <span include_once</span>('connect.php'<span );
</span><span 3</span>
<span 4</span> <span $page</span> = <span intval</span>(<span $_POST</span>['pageNum'<span ]);
</span><span 5</span>
<span 6</span> <span $result</span> = <span mysql_query</span>("select id from food"<span );
</span><span 7</span> <span $total</span> = <span mysql_num_rows</span>(<span $result</span>);<span //</span><span 总记录数</span>
<span 8</span>
<span 9</span> <span $pageSize</span> = 8; <span //</span><span 每页显示数</span>
<span 10</span> <span $totalPage</span> = <span ceil</span>(<span $total</span>/<span $pageSize</span>); <span //</span><span 总页数</span>
<span 11</span>
<span 12</span> <span $startPage</span> = <span $page</span>*<span $pageSize</span><span ;
</span><span 13</span> <span $arr</span>['total'] = <span $total</span><span ;
</span><span 14</span> <span $arr</span>['pageSize'] = <span $pageSize</span><span ;
</span><span 15</span> <span $arr</span>['totalPage'] = <span $totalPage</span><span ;
</span><span 16</span> <span $query</span> = <span mysql_query</span>("select id,title,pic from food order by id asc limit <span $startPage</span>,<span $pageSize</span>"<span );
</span><span 17</span> <span while</span>(<span $row</span>=<span mysql_fetch_array</span>(<span $query</span><span )){
</span><span 18</span> <span $arr</span>['list'][] = <span array</span><span (
</span><span 19</span> 'id' => <span $row</span>['id'],
<span 20</span> 'title' => <span $row</span>['title'],
<span 21</span> 'pic' => <span $row</span>['pic'],
<span 22</span> <span );
</span><span 23</span> <span }
</span><span 24</span> <span //</span><span print_r($arr);</span>
<span 25</span> <span echo</span> json_encode(<span $arr</span><span );
</span><span 26</span> ?>
然后就完成了，具体思路很清晰，点击页数的时候jquery获取rel中的页面值，传进去数据库获取相应数据展现在页面上。
然后还有数据库吧，我的表示这样的：
<span>1</span> <span>CREATE</span> <span>TABLE</span> <span>IF</span> <span>NOT</span> <span>EXISTS</span><span> `food` ( </span><span>2</span> `id` <span>int</span>(<span>11</span>) <span>NOT</span> <span>NULL</span><span> AUTO_INCREMENT, </span><span>3</span> `title` <span>varchar</span>(<span>100</span>) <span>NOT</span> <span>NULL</span><span>, </span><span>4</span> `pic` <span>varchar</span>(<span>255</span>) <span>NOT</span> <span>NULL</span><span>, </span><span>5</span> <span>PRIMARY</span> <span>KEY</span><span> (`id`) </span><span>6</span> ) ENGINE<span>=</span>MyISAM <span>DEFAULT</span> CHARSET<span>=</span>utf8 AUTO_INCREMENT<span>=</span><span>31</span> ;
我这边有一个demo，然后大家可以下载看看。多多指教。
http://pan.baidu.com/share/link?shareid=1518322039&uk=67299903
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Kunci muat semula F5 tidak berfungsi dalam Windows 11
Mar 14, 2024 pm 01:01 PM
Adakah kunci F5 tidak berfungsi dengan betul pada PC Windows 11/10 anda? Kekunci F5 biasanya digunakan untuk menyegarkan desktop atau penjelajah atau memuat semula halaman web. Walau bagaimanapun, sesetengah pembaca kami telah melaporkan bahawa kekunci F5 sedang menyegarkan komputer mereka dan tidak berfungsi dengan betul. Bagaimana untuk mendayakan penyegaran F5 dalam Windows 11? Untuk menyegarkan semula PC Windows anda, hanya tekan kekunci F5. Pada sesetengah komputer riba atau desktop, anda mungkin perlu menekan kombinasi kekunci Fn+F5 untuk menyelesaikan operasi muat semula. Mengapa penyegaran F5 tidak berfungsi? Jika menekan kekunci F5 gagal menyegarkan semula komputer anda atau anda mengalami masalah pada Windows 11/10, ia mungkin disebabkan oleh kekunci fungsi yang dikunci. Punca lain yang berpotensi termasuk papan kekunci atau kekunci F5
Bagaimana untuk mendapatkan pembolehubah daripada kaedah PHP menggunakan Ajax?
Mar 09, 2024 pm 05:36 PM
Menggunakan Ajax untuk mendapatkan pembolehubah daripada kaedah PHP adalah senario biasa dalam pembangunan web Melalui Ajax, halaman boleh diperoleh secara dinamik tanpa menyegarkan data. Dalam artikel ini, kami akan memperkenalkan cara menggunakan Ajax untuk mendapatkan pembolehubah daripada kaedah PHP, dan memberikan contoh kod khusus. Pertama, kita perlu menulis fail PHP untuk mengendalikan permintaan Ajax dan mengembalikan pembolehubah yang diperlukan. Berikut ialah kod contoh untuk fail PHP mudah getData.php:
Petua jQuery: Cepat ubah suai teks semua teg pada halaman
Feb 28, 2024 pm 09:06 PM
Tajuk: Petua jQuery: Cepat ubah suai teks semua teg pada halaman Dalam pembangunan web, kita selalunya perlu mengubah suai dan mengendalikan elemen pada halaman. Apabila menggunakan jQuery, kadangkala anda perlu mengubah suai kandungan teks semua teg dalam halaman sekaligus, yang boleh menjimatkan masa dan tenaga. Berikut akan memperkenalkan cara menggunakan jQuery untuk mengubah suai teks semua teg pada halaman dengan cepat, dan memberikan contoh kod khusus. Pertama, kita perlu memperkenalkan fail perpustakaan jQuery dan memastikan bahawa kod berikut dimasukkan ke dalam halaman: <
PHP dan Ajax: Membina enjin cadangan autolengkap
Jun 02, 2024 pm 08:39 PM
Bina enjin cadangan autolengkap menggunakan PHP dan Ajax: Skrip sisi pelayan: mengendalikan permintaan Ajax dan mengembalikan cadangan (autocomplete.php). Skrip pelanggan: Hantar permintaan Ajax dan cadangan paparan (autocomplete.js). Kes praktikal: Sertakan skrip dalam halaman HTML dan nyatakan pengecam elemen input carian.
Gunakan jQuery untuk mengubah suai kandungan teks semua teg
Feb 28, 2024 pm 05:42 PM
Tajuk: Gunakan jQuery untuk mengubah suai kandungan teks semua teg jQuery ialah perpustakaan JavaScript yang popular yang digunakan secara meluas untuk mengendalikan operasi DOM. Dalam pembangunan web, kita sering menghadapi keperluan untuk mengubah suai kandungan teks tag pautan (tag) pada halaman. Artikel ini akan menerangkan cara menggunakan jQuery untuk mencapai matlamat ini dan memberikan contoh kod khusus. Pertama, kita perlu memperkenalkan perpustakaan jQuery ke dalam halaman. Tambahkan kod berikut dalam fail HTML:
Cara terbaik untuk melaksanakan penomboran tatasusunan dalam PHP
May 04, 2024 pm 02:39 PM
Terdapat dua cara paling biasa untuk menomborkan tatasusunan PHP: menggunakan fungsi array_slice(): hitung bilangan elemen untuk dilangkau, dan kemudian ekstrak julat elemen yang ditentukan. Gunakan iterator terbina dalam: laksanakan antara muka Iterator, dan kaedah rewind(), key(), current(), next(), dan valid() digunakan untuk melintasi elemen dalam julat yang ditentukan.
PHP lwn. Ajax: Penyelesaian untuk mencipta kandungan yang dimuatkan secara dinamik
Jun 06, 2024 pm 01:12 PM
Ajax (JavaScript Asynchronous dan XML) membenarkan menambah kandungan dinamik tanpa memuatkan semula halaman. Menggunakan PHP dan Ajax, anda boleh memuatkan senarai produk secara dinamik: HTML mencipta halaman dengan elemen kontena dan permintaan Ajax menambah data pada elemen selepas memuatkannya. JavaScript menggunakan Ajax untuk menghantar permintaan kepada pelayan melalui XMLHttpRequest untuk mendapatkan data produk dalam format JSON daripada pelayan. PHP menggunakan MySQL untuk menanyakan data produk daripada pangkalan data dan mengekodnya ke dalam format JSON. JavaScript menghuraikan data JSON dan memaparkannya dalam bekas halaman. Mengklik butang mencetuskan permintaan Ajax untuk memuatkan senarai produk.
Bagaimana untuk mengetahui sama ada elemen jQuery mempunyai atribut tertentu?
Feb 29, 2024 am 09:03 AM
Bagaimana untuk mengetahui sama ada elemen jQuery mempunyai atribut tertentu? Apabila menggunakan jQuery untuk mengendalikan elemen DOM, anda sering menghadapi situasi di mana anda perlu menentukan sama ada sesuatu elemen mempunyai atribut tertentu. Dalam kes ini, kita boleh melaksanakan fungsi ini dengan mudah dengan bantuan kaedah yang disediakan oleh jQuery. Berikut akan memperkenalkan dua kaedah yang biasa digunakan untuk menentukan sama ada elemen jQuery mempunyai atribut khusus, dan melampirkan contoh kod tertentu. Kaedah 1: Gunakan kaedah attr() dan operator jenis // untuk menentukan sama ada elemen mempunyai atribut tertentu
