Make Your Microsoft Dynamics Investment Count & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.
Course Of The Month
8 days, 5 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
return unmatched characters with a regex funtion, php
Posted on 2009-03-30
Using PHP I need to validate a string in a function and eventually return something to the user like:
"Sorry, '<' is an invalid character"
I'm fine with just pulling the first unmatched character, but if it's easy enough we can show all of the invalid characters.
It's only for one small text field.
Allowed characters:
A-Z
a-z
0-9
!
?
'
"
-
(
)
"Sorry, '<' is an invalid character"
I'm fine with just pulling the first unmatched character, but if it's easy enough we can show all of the invalid characters.
It's only for one small text field.
Allowed characters:
A-Z
a-z
0-9
!
?
'
"
-
(
)
preg_match('/^[A-Za-z0-9\s.\!\?\'\:\"\-\(\)]+$/',$value));
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
4-
2
6 Comments
Active today
kenitech,
Try the expression in the snippet below.
Let me know if you have any questions or need more information.
b0lsc0tt
Try the expression in the snippet below.
Let me know if you have any questions or need more information.
b0lsc0tt
preg_match('/^[A-Za-z0-9 .!?':"()-]+$/',$value));
Active today
kenitech,
Oops. I misread this a bit. You can get all characters that don't match with ...
preg_match_all('/[^A-Za-z0
$result = $result[0];
The variable $result is an array. You can change it to a string or go through each item.
Let me know if you have a question.
b0lsc0tt
Oops. I misread this a bit. You can get all characters that don't match with ...
preg_match_all('/[^A-Za-z0
$result = $result[0];
The variable $result is an array. You can change it to a string or go through each item.
Let me know if you have a question.
b0lsc0tt
this is great thanks! before I accept/close, can you just please clarify the php documentation for preg_match_all?
http://us.php.net/preg_match_all
is it me or is it somewhat confusing that the $matches parameter is explained,
"Array of all matches in multi-dimensional array ordered according to flags ."
The output is the unmatched elements, though. This is what I want, but reading this leads me to believe otherwise.
thanks!
?
http://us.php.net/preg_match_all
is it me or is it somewhat confusing that the $matches parameter is explained,
"Array of all matches in multi-dimensional array ordered according to flags ."
The output is the unmatched elements, though. This is what I want, but reading this leads me to believe otherwise.
thanks!
?
Active today
Actually the output is the matched items. If you notice I changed the expression so it will match the characters you don't want to allow. Overlooking that change would make it seem to show non-matches. Notice the ^ that is right after the open bracket ( [ ).
Let me know if you have any other questions on preg_match_all or what I provided. I am glad it helped.
bol
Let me know if you have any other questions on preg_match_all or what I provided. I am glad it helped.
bol
Featured Post
We value your feedback.
Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Whatever be the reason, if you are working on web development side, you will need day-today validation codes like email validation, date validation , IP address validation, phone validation on any of the edit page or say at the time of registration…
Part of the Global Positioning System
A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern:
T…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing.
Set up your basic HTML file. Open your form tag and set the method and action attributes.:
(CODE)
Set up your first few inputs one for the name and …
Suggested Courses
Course of the Month8 days, 5 hours left to enroll
728 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.