how to extract number in php using regex?

Question

If I want to extract only "7.20" from "$ 7.20", how can I do?? I have try

preg_replace("[^0-9]", "", "$ 7.20");

but it is not work. It also shows $ 7.20... There is no difference...

hakre · Accepted Answer · 2011-10-13 14:26:11Z

4

preg_replace('/[^.0-9]/', "", "$ 7.20");

Your regex needs to be delimited, start and end. Commonly / is used as a delimiter.

What you have above: [^0-9]

The initial [ will be interpreted as a delimiter (in pair with ] at the end).

This was looking to replace 0-9 literally at the beginning of the string.

edited Oct 13, 2011 at 14:26

hakre

200k55 gold badges454 silver badges865 bronze badges

answered Oct 13, 2011 at 14:17

awm

6,58027 silver badges24 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

hakre Over a year ago

You can use brackets as delimiters, so [] is actually okay, like ().

awm Over a year ago

@hakre Gosh, I never noticed that before. Right you are. Thanks for the edit.

Davide · Accepted Answer · 2011-10-13 15:35:49Z

2

You could also try sscanf, usually easier to use

sscanf( '$ 7.20', '$ %f' );

answered Oct 13, 2011 at 15:35

Davide

2,3391 gold badge14 silver badges12 bronze badges

1 Comment

mickmackusa Over a year ago

With ltrim() and a character mask of $ you can easily remove the leading unwanted characters. In addition to being brief and correct, sscanf() is more powerful than other techniques because it allows you to cast the matched substring as a float.

Collectives™ on Stack Overflow

how to extract number in php using regex?

2 Answers 2

2 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related