I am trying to learn regular expressions and have a question for the following codes
Why does this code allow everything
return (preg_match_all ("/[a-z]\'\-\s*/", $testString));
Why does this allow nothing
return (preg_match_all ("/^[a-z]\'\-\s*$/", $testString));
What test strings are you using?
The difference between the two is quite simple, the latter requires the beginning of the string to match a-z (lowercase) and end with at least 1 space.
Then what do I do to make the 1st code only allow whats listed?
Tell me what strings you want captured and what you do not want captured and I can answer that.
That is for first and last name, I want to allow for spaces, hyphens and apostrophes. Maybe you clarify my assumptions about regular expressions. Does it return 0 when a character is inserted that is not in the argument or does it just check to see if the listed characters are there?
There, fixed that for you
I think what you're looking for this
Please note that this does not allow for special characters like the é in my name.
For names I mostly find it easiest to just strip_tags to prevent script injection and be done with it.
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