PHP判断密码强度的方法详解

$score = 0;if(!empty($_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;

<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>

<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();        }    });}

<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>