php preg_match using shorthand and character class combined

Question

echo preg_match( '/\d[A-Z]/', 'CD' ); // Displays “0”

How can it display 0 when clearly there are characters that match the range "[A-Z]"?

Is it the way the parsing occurs?

score 1 · Accepted Answer · answered Mar 08 '13 at 13:33

1

The regex /\d[A-Z]/ says that the input must have a digit first, and then an alphabet must be present.
Since the input CD doesnot contain a digit and an alphabet following it, the function returns 0.

To match more than one capital letters or digits, you can use the following regex.

/[\dA-Z]+/

answered Mar 08 '13 at 13:33

Ali Shah Ahmed

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I realized what you said after some examination and deep thought of the expression. – Robert Mar 08 '13 at 13:47
well am glad that you finally understood. – Ali Shah Ahmed Mar 08 '13 at 16:55

php preg_match using shorthand and character class combined

1 Answers1