Php regular expression failed

Question

I am trying to write a regex that will only allow text uppercase and lower. I had no idea how to write any regex so I found a post on Stack

How do I write a regex in PHP to remove special characters?

With a link to a place to learn. The tut is fantastic so do read if yuo have trouble with regex.

if( preg_match('/^([A-Za-z\s]+)&/', $pagename) ) {
 //do stuff
 } 
 else  
 {echo"no special char or num";}

How ever it fails. If I type for example

New Web Page

it should allow this but it fails.

fyi \s matches for a "whitespace" character (eg: a space, tab, etc.). If you really want to only match letters, you need to remove that. Also, you can shorten the regex by using the i modifier. — CrayonViolent
– CrayonViolent, Commented Jan 28, 2013 at 16:20
are you sure the $pagename contains the correct value that you are parsing? — TheTechGuy
– TheTechGuy, Commented Jan 28, 2013 at 16:22

t.niese · Accepted Answer · 2013-01-28 16:17:34Z

1

$ is the right sign for ends with not &

it should be /^([A-Za-z\s]+)$/

answered Jan 28, 2013 at 16:17

t.niese

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Baba · Accepted Answer · 2013-01-28 16:21:12Z

1

I am trying to write a regex that will only allow text uppercase and lower. All you need is

 '/^([A-Z]+)$/i'
            ^
            |-------- Note used $ instead of &

answered Jan 28, 2013 at 16:21

Baba

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Comments

ChrisIPowell · Accepted Answer · 2013-01-28 16:28:46Z

0

You don't need the round brackets, and replace & with $ (end of string).

edited Jan 28, 2013 at 16:28

answered Jan 28, 2013 at 16:17

ChrisIPowell

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5 Comments

user387049 Over a year ago

He needs the brackets to show that a-z and A-Z are character sets

CD001 Over a year ago

I suspect he means the parentheses rather than the brackets - technically the parentheses are unnecessary unless you want to create/store a sub-pattern.

melpomene Over a year ago

(), [], {} - are these A) (round) brackets, square brackets, curly brackets, or B) parens, brackets, braces? :-)

ChrisIPowell Over a year ago

OP's looking for a true or false, so he needs the square brackets but not the round ones so /^[a-zA-Z\s]+$/ would do exactly what he wants.

ChrisIPowell Over a year ago

Yes, brackets means (), should've been clearer I meant those and not the Square brackets []!

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