本文实例讲述了PHP判断密码强度的方法。分享给大家供大家参考，具体如下：
一、php页面
$score = 0; if(!empty($_GET["value"])){ //接收的值 $str = $_GET["value"]; } else{ $str = ""; } if(preg_match("/[0-9]+/",$str)) { $score ++; } if(preg_match("/[0-9]{3,}/",$str)) { $score ++; } if(preg_match("/[a-z]+/",$str)) { $score ++; } if(preg_match("/[a-z]{3,}/",$str)) { $score ++; } if(preg_match("/[A-Z]+/",$str)) { $score ++; } if(preg_match("/[A-Z]{3,}/",$str)) { $score ++; } if(preg_match("/[_|\-|+|=|*|!|@|#|$|%|^|&|(|)]+/",$str)) { $score += 2; } if(preg_match("/[_|\-|+|=|*|!|@|#|$|%|^|&|(|)]{3,}/",$str)) { $score ++ ; } if(strlen($str) >= 10) { $score ++; } echo $score; exit;
二、html页面
<table cellspacing="0" cellpadding="0"> <tr> <td>输入密码：</td> <td colspan="4"><input type="password" value="" name="newpwd" onblur="getPassword();" /> </tr> <tr> <td>密码强度：</td> <td id="idSM1" align="middle" width="20%"><span style="height:0px; line-height:0px;"></span><span id="idSMT1" style="DISPLAY: none">弱</span></td> <td id="idSM2" style="BORDER-LEFT: #fff 1px solid" align="middle" width="20%"><span style="height:0px; line-height:0px;"></span><span id="idSMT0" style="DISPLAY:inline; FONT-WEIGHT: normal; COLOR: #666">无</span><span id="idSMT2" style="DISPLAY: none">中等</span></td> <td id="idSM3" style="BORDER-LEFT: #fff 1px solid" align="middle" width="20%"><span style="height:0px; line-height:0px;"></span><span id="idSMT3" style="DISPLAY: none">强</span></td> <td id="idSM4" style="BORDER-LEFT: #fff 1px solid" align="middle" width="20%"> <span style="height:0px; line-height:0px;"></span><span id="idSMT4" style="DISPLAY: none">极好</span></td> </tr> </table>
三、js
<script> function getPassword(){ var value = $("input[name="newpwd"]").attr("value"); $.get("index.php?r=account/testpwd",{value:value},function(data){ if(data>=1 && data<=3){ $("#idSM1").attr("class","pwdChkCon1"); //弱 $("#idSM2").attr("class","pwdChkCon0"); $("#idSM3").attr("class","pwdChkCon0"); $("#idSM4").attr("class","pwdChkCon0"); $("#idSMT1").show(); $("#idSMT0").hide(); $("#idSMT2").hide(); $("#idSMT3").hide(); $("#idSMT4").hide(); } else if(data>=4 && data<=6){ //中等 $("#idSM1").attr("class","pwdChkCon2"); $("#idSM2").attr("class","pwdChkCon2"); $("#idSM3").attr("class","pwdChkCon0"); $("#idSM4").attr("class","pwdChkCon0"); $("#idSMT0").hide(); $("#idSMT1").hide(); $("#idSMT2").show(); $("#idSMT3").hide(); $("#idSMT4").hide(); } else if(data>=7 && data<=8){ //强 $("#idSM1").attr("class","pwdChkCon3"); $("#idSM2").attr("class","pwdChkCon3"); $("#idSM3").attr("class","pwdChkCon3"); $("#idSM4").attr("class","pwdChkCon0"); $("#idSMT0").hide(); $("#idSMT1").hide(); $("#idSMT2").hide(); $("#idSMT3").show(); $("#idSMT4").hide(); } else if(data>=9 && data<=10){ //极好 $("#idSM1").attr("class","pwdChkCon4"); $("#idSM2").attr("class","pwdChkCon4"); $("#idSM3").attr("class","pwdChkCon4"); $("#idSM4").attr("class","pwdChkCon4"); $("#idSMT0").hide(); $("#idSMT1").hide(); $("#idSMT2").hide(); $("#idSMT3").hide(); $("#idSMT4").show(); } }); }
四、css
<style> .pwdChkCon0 {BORDER-RIGHT: #bebebe 1px solid;BORDER-BOTTOM: #bebebe 1px solid;BACKGROUND-COLOR: #ebebeb;TEXT-ALIGN: center;} .pwdChkCon1 {BORDER-RIGHT: #bb2b2b 1px solid;BORDER-BOTTOM: #bb2b2b 1px solid;BACKGROUND-COLOR: #ff4545;TEXT-ALIGN: center;} .pwdChkCon2 {BORDER-RIGHT: #e9ae10 1px solid;BORDER-BOTTOM: #e9ae10 1px solid;BACKGROUND-COLOR: #ffd35e;TEXT-ALIGN: center;} .pwdChkCon3 {BORDER-RIGHT: #267a12 1px solid;BORDER-BOTTOM: #267a12 1px solid;BACKGROUND-COLOR: #3abb1c;TEXT-ALIGN: center;} .pwdChkCon4 {BORDER-RIGHT: #267a12 1px solid;BORDER-BOTTOM: #267a12 1px solid;BACKGROUND-COLOR: #3abb1c;TEXT-ALIGN: center;} </style>