PHP Judgment Password strength

One, php page $score = 0; if (!empty ($_get[' value ')) { //received value $STR = $_get[' value '];} else{$str = ';} if (Preg_match ("/[0-9]+/", $str)) {$score + +;} if (Preg_match ("/[0-9]{3,}/", $str)) {$score + +;} if (pre G_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 ("/[_\-+=*!@#$%^& ()]+/", $str)) {$sco Re + = 2; } if (Preg_match ("/[_\-+=*!@#$%^& ()]{3,}/", $str)) {$score + +;} if (Strlen ($STR) >=) {$score + +;} echo $score; Exit Second, HTML page <table cellspacing= "0" cellpadding= "0" > <tr> <td> input password:</td> <td colspan= "4" > <input type= "Password" value= "name=" Newpwd "onblur=" GetPassword (); "/> </tr> <tr> <td> Password strength: </td> <td id= "idSM1" align= "Middle" width= "20% ><span" style=; line-height:0px; " > </span><span id= "idSMT1" style= "Display:none" > Weak </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 "> No </span><span id=" idSMT2 "style=" Display:none "> Medium </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" > Strong </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" > excellent </span></td> </tr> </ Table> III, JS <script> function GetPassword () {var value = $ ("input[name= ' newpwd ')"). attr (' value '); $.get (' Index.php?r=account/testpwd ', {value:value},function (data) {if (Data>=1 &&Amp data<=3) {$ (' #idSM1 '). attr (' class ', ' PwdChkCon1 ');//Weak $ (' #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) { //medium $ (' #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) { //strong $ (' #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) { //extremely good $ (' #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 (); } }); Four, 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>