PHP Common detection Function collection

<?php


"Warning": please do not change without permission


"FileName": c_check.inc


"Role": a set of common detection functions


"Author": Sky Ash


"Last Modified Date": 2001/05/11[cxx]


"Variable definition rule": ' C_ ' = character type, ' i_ ' = integral type, ' n_ ' = numeric, ' L_ ' = boolean, ' a_ ' = array type





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※checkmoney ($C _money) checks whether the data is in 99999.99 format


※CHECKEMAILADDR ($C _mailaddr) to determine if it is a valid mailing address


※CHECKWEBADDR ($C _weburl) to determine whether it is a valid URL


※checkempty ($C _char) to determine whether the string is empty


※checklengthbetween ($C _char, $I _len1, $I _len2=100) determines whether the string is within the specified length


※checkuser ($C _user) to determine whether a legitimate user name


※checkpassword ($C _passwd) to determine whether a legal user password


※checktelephone ($C _telephone) to determine whether a legal phone number


※checkvaluebetween ($N _var, $N _val1, $N _val2) to determine whether it is a legal value in a range


※checkpost ($C _post) to determine whether the legal ZIP code (fixed length)


※checkextendname ($C _filename, $A _extend) to determine the extension of the uploaded file


※checkimagesize ($ImageFileName, $LimitSize) Check the size of uploaded pictures


※alertexit ($C _alert, $I _goback=0) Illegal operation warning and exiting


※alert ($C _alert, $I _goback=0) Illegal operation warning


※replacespacialchar ($C _char) special character substitution function


※exchangemoney ($N _money) Capital conversion function


※windowlocation ($C _url, $C _get= "", $C _getother= "") window.location function in PHP








Function name: Checkmoney ($C _money)


Function: Check whether the data is 99999.99 format


Parameters: $C _money (number to be detected)


Return Value: Boolean value


Note: none








function Checkmoney ($C _money)


{


if (!ereg ("^[0-9][.] [0-9]$ ", $C _money)) return false;


return true;


}





Function name: checkemailaddr ($C _mailaddr)


Role: Determine if a valid mailing address


Parameters: $C _mailaddr (email address to be detected)


Return Value: Boolean value


Note: none





function checkemailaddr ($C _mailaddr)


{


if (!eregi () ^[_a-z0-9-]+ (. [ _a-z0-9-]+) *@[a-z0-9-]+ (. [ a-z0-9-]+) *$ ",


$C _mailaddr))


(!ereg ("^[_a-za-z0-9-]+" (. [ _a-za-z0-9-]+) *@[_a-za-z0-9-]+ (. [ _a-za-z0-9-]+) *$ ",


$c _mailaddr))


{


return false;


}


return true;


}








Function name: checkwebaddr ($C _weburl)


Role: To determine whether a valid Web site


Parameters: $C _weburl (URLs to be detected)


Return Value: Boolean value


Note: none





function checkwebaddr ($C _weburl)


{


if (!ereg () ^http://[_a-za-z0-9-]+ (. [ _a-za-z0-9-]+) *$ ", $C _weburl))


{


return false;


}


return true;


}








Function name: Checkempty ($C _char)


Role: Determine if the string is empty


Parameters: $C _char (string to be detected)


Return Value: Boolean value


Note: none





function checkemptystring ($C _char)


{


if (!is_string ($C _char)) return false; Whether it is a string type


if (Empty ($C _char)) return false; Whether it has been set


if ($C _char== ') return false; is empty


return true;


}











Function name: Checklengthbetween ($C _char, $I _len1, $I _len2=100)


Role: Determine whether the string within the specified length


Parameters: $C _char (string to be detected)


$I _len1 (lower bound of the length of the target string)


$I _len2 (upper limit of target string length)


Return Value: Boolean value


Note: none





function Checklengthbetween ($C _cahr, $I _len1, $I _len2=100)


{


$C _cahr = Trim ($C _cahr);


if (strlen ($C _cahr) < $I _len1) return false;


if (strlen ($C _cahr) > $I _len2) return false;


return true;


}








Function name: CheckUser ($C _user)


Role: To determine whether a legitimate user name


Parameters: $C _user (user name to be detected)


Return Value: Boolean value


Note: none





function CheckUser ($C _user)


{


if (! Checklengthbetween ($C _user, 4)) return false; Width test


if (!ereg ("^[_a-za-z0-9]*$", $C _user)) return false; Special character test


return true;


}








Function name: Checkpassword ($C _passwd)


Role: Determine if the password is a legitimate user


Parameters: $C _passwd (password to be detected)


Return Value: Boolean value


Note: none





function Checkpassword ($C _passwd)


{


if (! Checklengthbetween ($C _passwd, 4)) return false; Width detection


if (!ereg ("^[_a-za-z0-9]*$", $C _passwd)) return false; Special character detection


return true;


}








Function name: Checktelephone ($C _telephone)


Role: To determine whether a legal telephone number


Parameters: $C _telephone (phone number to be detected)


Return Value: Boolean value


Note: none





function Checktelephone ($C _telephone)


{


if (!ereg ("^[+]?[ 0-9]+ ([xx-][0-9]+) *$ ", $C _telephone)) return false;


return true;


}








Function name: Checkvaluebetween ($N _var, $N _val1, $N _val2)


Role: To determine whether a range of legal values


Parameters: $N _var value to be detected


$N the upper limit of the _VAR1 value to be detected


$N _var2 the lower bound of the value to be detected


Return Value: Boolean value


Note: none





function Checkvaluebetween ($N _var, $N _val1, $N _val2)


{


if ($N _var < $N _var1││ $N _var > $N _var2)


{


return false;


}


return true;


}











Function name: checkpost ($C _post)


Role: To determine whether the legal ZIP code (fixed length)


Parameters: $C _post (zip code to check)


Return Value: Boolean value


Note: none





function checkpost ($C _post)


{


$C _post=trim ($C _post);


if (strlen ($C _post) = = 6)


{


if (!ereg ("^[+]?[ _0-9]*$ ", $C _post))


{


return true;;;


}else


{


return false;


}


}else


{


return false;;;


}


}











Function name: Checkextendname ($C _filename, $A _extend)


Role: Upload file extension to determine the name


Parameters: $C _filename uploaded file name


$A extension required by _extend


Return Value: Boolean value


Note: none





function Checkextendname ($C _filename, $A _extend)


{


if (strlen ($C _filename)) < 5)


{


return 0; return 0 means no pictures uploaded


}


$lastdot = Strrpos ($C _filename, "."); Take out. The last place to appear


$extended = substr ($C _filename, $lastdot + 1); Remove extension


For ($i =0 $i <count ($A _extend), $i + +)//For testing


{


if (Trim (Strtolower ($extended)) = = Trim (Strtolower ($A _extend[$i)))//Convert Large


Lowercase and detects


{


$flag = 1; Plus success Sign


$i =count ($A _extend); Stop detection when detected.


}


}


if ($flag <>1)


{


For ($j =0 $j <count ($A _extend); $j + +)//list the types of extensions allowed to upload


{


$alarm. = $A _extend[$j]. " ";


}


Alertexit (' Upload only '. $alarm. ' File! And you're uploading a '. $extended. ' Type of file ');


return-1; Return-1 indicates the type of upload image does not match


}


return 1; Returns 1 indicating that the type of the picture meets the requirements


}








Function name: Checkimagesize ($ImageFileName, $LimitSize)


Role: Check the size of uploaded pictures


Parameters: $ImageFileName uploaded picture name


Size of $LimitSize requirements


Return Value: Boolean value


Note: none





function Checkimagesize ($ImageFileName, $LimitSize)


{


$size =getimagesize ($ImageFileName);


if ($size [0]> $LimitSize [0]││ $size [1]> $LimitSize [1])


{


Alertexit (' picture size too big ');


return false;


}


return true;


}











Function name: Alert ($C _alert, $I _goback=0)


Role: illegal Operation warning


Parameters: $C _alert (Error message for prompts)


$I _goback (back to that page)


return value: String


Note: none





function Alert ($C _alert, $I _goback=0)


{


if ($I _goback<>0)


{


echo "<script>alert (' $C _alert '); History.go ($I _goback);</script>";


}


Else


{


echo "<script>alert (' $C _alert ');</script>";


}


}











Function name: Alertexit ($C _alert, $I _goback=0)


Role: illegal Operation warning


Parameters: $C _alert (Error message for prompts)


$I _goback (back to that page)


return value: String


Note: none


function Alertexit ($C _alert, $I _goback=0)


{


if ($I _goback<>0)


{


echo "<script>alert (' $C _alert '); History.go ($I _goback);</script>";


Exit


}


Else


{


echo "<script>alert (' $C _alert ');</script>";


Exit


}


}











Function name: Replacespacialchar ($C _char)


Function: Special character substitution function


Parameters: $C _char (strings to be replaced)


return value: String


Note: none





function Replacespecialchar ($C _char)


{


$C _char=htmlspecialchars ($C _char); Converts a special character into HTML format.


$C _char=nl2br ($C _char); Replace the carriage return with the <br>


$C _char=str_replace ("", "", $C _char); Replace a space with


$C _char=str_replace ("A;?", "<", $C _char); Replace PHP tags


return $C _char;


}








Function name: Exchangemoney ($N _money)


Function: Capital Conversion functions


Parameters: $N _money (number of amounts to convert)


return value: String


Note: This function example: $char =exchangemoney (5645132.3155) ==>


$char = ' ￥5,645,132.31 '





function Exchangemoney ($N _money)


{


$A _tmp=explode (".", $N _money); Divide the number into two parts by a decimal point and save it in an array $a_tmp


$I _len=strlen ($A _tmp[0]); Measure the width of the number of digits before the decimal point


if ($I _len%3==0)


{


$I _step= $I _LEN/3; such as the width of the front digits mod 3 = 0, can be pressed, divided into $i_step


Part


}else


{


$step = ($len-$len%3)/3+1; such as the width of the front digits mod 3!= 0, can be pressed, divided into $i_step


Part +1


}


$C _cur= "";


Convert the amount number before the decimal point


while ($I _len<>0)


{


$I _step--;


if ($I _step==0)


{


$C _cur. = substr ($A _tmp[0],0, $I _len-($I _step) *3);


}else


{


$C _cur. = substr ($A _tmp[0],0, $I _len-($I _step) *3). ",";


}


$A _tmp[0]=substr ($A _tmp[0], $I _len-($I _step) *3);


$I _len=strlen ($A _tmp[0]);


}


Convert the amount after the decimal point


if ($A _tmp[1]== "")


{


$C _cur. = ". 00";


}else


{


$I _len=strlen ($A _tmp[1]);


if ($I _len<2)


{


$C _cur. = ".". $A _tmp[1]. " 0 ";


}else


{


$C _cur. = ".". substr ($A _tmp[1],0,2);


}


}


Plus RMB symbol and outgoing


$C _cur= "￥". $C _cur;


return $C _cur;


}











Function name: windowlocation ($C _url, $C _get= "", $C _getother= "")


Function: window.location function in PHP


Parameters: $C _url to the URL of the window


$C _get Get method parameters


$C other parameters for the _getother get method


return value: String


Note: none





function Windowlocation ($C _url, $C _get= "", $C _getother= "")


{


if ($C _get = "" && $C _getother = "")


if ($C _get = = "" && $C _getother <> "") {$C _target= ' window.location= ' $C _url?


$C _getother= ' +this.value ' ";}


if ($C _get <> "" && $C _getother = = "") {$C _target= ' window.location= ' $C _url?


$C _get ' "";}


if ($C _get <> "&& $C _getother <>") {$C _target= "window.location= ' $C _url?


$C _get& $C _getother= ' +this.value ';}


return $C _target;


}


?>