会python真的可以为所欲为0(回)
448天前
这里还有人吗1(回)
633天前这里还有人吗0(回)
633天前
每天面对着电脑屏幕，敲打键盘。我所面对的并不只是代码，而是一种生活方式。0(回)
858天前到处都是羊，不想上班0(回)
938天前
鸽子
0(回)
942天前<?php |
# ------------------------------------------------------------------------ |
# Credit Card Validation Solution, version 3.5 PHP Edition |
# 25 May 2000 |
# |
# COPYRIGHT NOTICE: |
# a) This code is property of The Analysis and Solutions Company. |
# b) It is being distributed free of charge and on an "as is" basis. |
# c) Use of this code, or any part thereof, is contingent upon leaving |
# this copyright notice, name and address information in tact. |
# d) Written permission must be obtained from us before this code, or any |
# part thereof, is sold or used in a product which is sold. |
# e) By using this code, you accept full responsibility for its use |
# and will not hold the Analysis and Solutions Company, its employees |
# or officers liable for damages of any sort. |
# f) This code is not to be used for illegal purposes. |
# g) Please email us any revisions made to this code. |
# |
# Copyright 2000 http://www.AnalysisAndSolutions.com/code/ |
# The Analysis and Solutions Company info@AnalysisAndSolutions.com |
# ------------------------------------------------------------------------ |
# |
# DESCRIPTION: |
# Credit Card Validation Solution uses a four step process to ensure |
# credit card numbers are keyed in correctly. This procedure accurately |
# checks cards from American Express, Australian BankCard, Carte Blache, |
# Diners Club, Discover/Novus, JCB, MasterCard and Visa. |
# |
# CAUTION: |
# CCVS uses exact number ranges as part of the validation process. These |
# ranges are current as of 20 October 1999. If presently undefined ranges |
# come into use in the future, this program will improperly deject card |
# numbers in such ranges, rendering an error message entitled "Potential |
# Card Type Discrepancy." If this happens while entering a card & type |
# you KNOW are valid, please contact us so we can update the ranges. |
# |
# POTENTIAL CUSTOMIZATIONS: |
# * If you don't accept some of these card types, edit Step 2, using pound |
# signs "#" to comment out the "elseif," "$CardName" and "$ShouldLength" |
# lines in question. |
# * Additional card types can be added by inserting new "elseif," |
# "$CardName" and "$ShouldLength" lines in Step 2. |
# * The three functions here can be called by other PHP documents to check |
# any number. |
# |
# CREDITS: |
# We learned of the Mod 10 Algorithm in some Perl code, entitled |
# "The Validator," available on Matt's Script Archive, |
# http://worldwidemart.com/scripts/readme/ccver.shtml. That code was |
# written by David Paris, who based it on material Melvyn Myers reposted |
# from an unknown author. Paris credits Aries Solis for tracking down the |
# data underlying the algorithm. At the same time, our code bears no |
# resemblance to its predecessors. CCValidationSolution was first written |
# for Visual Basic, on which Allen Browne and Rico Zschau assisted. |
# Neil Fraser helped prune down the OnlyNumericSolution() for Perl. |
function CCValidationSolution ($Number) { |
global $CardName; |
# 1) Get rid of spaces and non-numeric characters. |
$Number = OnlyNumericSolution($Number); |
# 2) Do the first four digits fit within proper ranges? |
# If so, who's the card issuer and how long should the number be? |
$NumberLeft = substr($Number, 0, 4); |
$NumberLength = strlen($Number); |
if ($NumberLeft >= 3000 and $NumberLeft <= 3059) { |
$CardName = "Diners Club"; |
$ShouldLength = 14; |
} elseif ($NumberLeft >= 3600 and $NumberLeft <= 3699) { |
$CardName = "Diners Club"; |
$ShouldLength = 14; |
} elseif ($NumberLeft >= 3800 and $NumberLeft <= 3889) { |
$CardName = "Diners Club"; |
$ShouldLength = 14; |
} elseif ($NumberLeft >= 3400 and $NumberLeft <= 3499) { |
$CardName = "American Express"; |
$ShouldLength = 15; |
} elseif ($NumberLeft >= 3700 and $NumberLeft <= 3799) { |
$CardName = "American Express"; |
$ShouldLength = 15; |
} elseif ($NumberLeft >= 3528 and $NumberLeft <= 3589) { |
$CardName = "JCB"; |
$ShouldLength = 16; |
} elseif ($NumberLeft >= 3890 and $NumberLeft <= 3899) { |
$CardName = "Carte Blache"; |
$ShouldLength = 14; |
} elseif ($NumberLeft >= 4000 and $NumberLeft <= 4999) { |
$CardName = "Visa"; |
if ($NumberLength > 14) { |
$ShouldLength = 16; |
} elseif ($NumberLength < 14) { |
$ShouldLength = 13; |
} else { |
echo "<br /><em>The Visa number entered, $Number, in is 14 digits long.<br />Visa cards usually have 16 digits, though some have 13.<br />Please check the number and try again.</em><br />n"; |
return FALSE; |
} |
} elseif ($NumberLeft >= 5100 and $NumberLeft <= 5599) { |
$CardName = "MasterCard"; |
$ShouldLength = 16; |
} elseif ($NumberLeft == 5610) { |
$CardName = "Australian BankCard"; |
$ShouldLength = 16; |
} elseif ($NumberLeft == 6011) { |
$CardName = "Discover/Novus"; |
$ShouldLength = 16; |
} else { |
echo "<br /><em>The first four digits of the number entered are $NumberLeft. <br />If that's correct, we don't accept that type of credit card.<br />If it's wrong, please try again.</em><br />n"; |
return FALSE; |
} |
# 3) Is the number the right length? |
if ($NumberLength <> $ShouldLength) { |
$Missing = $NumberLength - $ShouldLength; |
if ($Missing < 0) { |
echo "<br /><em>The $CardName number entered, $Number, is missing " . abs($Missing) . " digit(s).<br />Please check the number and try again.</em><br />n"; |
} else { |
echo "<br /><em>The $CardName number entered, $Number, has $Missing too many digit(s).<br />Please check the number and try again.</em><br />n"; |
} |
return FALSE; |
} |
# 4) Does the number pass the Mod 10 Algorithm Checksum? |
if (Mod10Solution($Number) == TRUE) { |
return TRUE; |
} else { |
echo "<br /><em>The $CardName number entered, $Number, is invalid.<br />Please check the number and try again.</em><br />n"; |
return FALSE; |
} |
} |
function OnlyNumericSolution ($Number) { |
# Remove any non numeric characters. |
# Ensure number is no more than 19 characters long. |
return substr( ereg_replace( "[^0-9]", "", $Number) , 0, 19); |
} |
function Mod10Solution ($Number) { |
$NumberLength = strlen($Number); |
$Checksum = 0; |
# Add even digits in even length strings |
# or odd digits in odd length strings. |
for ($Location = 1 - ($NumberLength % 2); $Location < $NumberLength; $Location += 2) { |
$Checksum += substr($Number, $Location, 1); |
} |
# Analyze odd digits in even length strings |
# or even digits in odd length strings. |
for ($Location = ($NumberLength % 2); $Location < $NumberLength; $Location += 2) { |
$Digit = substr($Number, $Location, 1) * 2; |
if ($Digit < 10) { |
$Checksum += $Digit; |
} else { |
$Checksum += $Digit - 9; |
} |
} |
# Is the checksum divisible by ten? |
return ($Checksum % 10 == 0); |
} |
# ----------- BEGIN SAMPLE USER INTERFACE SECTION ------------ |
# |
# This section provides a simple sample user interface for the |
# Credit Card Validation functions. It generates an HTML form |
# where you enter a card number to check. |
# |
# If a number has been posted by the form, check it. |
if ( isset($Number) ) { |
# Get rid of spaces and non-numeric characters in posted |
# numbers so they display correctly on the input form. |
$Number = OnlyNumericSolution($Number); |
if (CCValidationSolution($Number) == TRUE) { |
echo "<br />The $CardName number entered, $Number, <em>is</em> valid.<br />n"; |
} |
} else { |
$Number = ""; |
} |
# Setup an input form. Posting it calls this page again. |
echo "<form method="post" action="$REQUEST_URI">n"; |
echo "<br />Credit Card Number: <input type="text" name="Number" value="$Number">n"; |
echo "<input type="Submit" name="submitr" value="Check its Validity">n"; |
echo "</form><br />n"; |
# |
# ------------ END SAMPLE USER INTERFACE SECTION ------------- |
?> |
