PHP User name password phone number legal judgment code

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

The code is as follows	Copy Code
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

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The code is as follows	Copy Code
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

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code is as follows	copy code
function Checktelephone ($C _telephone) { If!ereg ("^[+]?[ 0-9]+ ([xx-][0-9]+) *$ ", $C _telephone)) return false; return true; }