PHP extract substring from strings in text

Question

I'have a text composed of many strings and for each string, if the check is true, I would like to get a specific one having some attributes:

the string starts with a sign like "atm"
after the sign there is a numeric part with a variable lenght

i.e. the word could be like atm123456 or atm7890

Any help is appreciated, thanks.

i have not done anything yet, i can't figure out the solution.. — Luke
– Luke, Commented Aug 28, 2014 at 13:31
something like substr($text, $start-point, $lenght) but how to calculate the lenght of the numeric part only? — Luke
– Luke, Commented Aug 28, 2014 at 13:32
@Luke substr is also a good way to do yes, to calculate the length of the numeric part you could just read from 4 to the end of the string. — Clément Malet
– Clément Malet, Commented Aug 28, 2014 at 13:43
@ClémentMalet thank you, the problem is that the numeric part has a variable lenght and after the numeric part there is a space and then another string — Luke
– Luke, Commented Aug 28, 2014 at 13:46

hlscalon · Accepted Answer · 2014-08-28 13:55:20Z

1

You can use regular expression and preg_match() function

$string = "atm123456";
$pattern = "(atm\d+)";
preg_match($pattern, $string, $matches); // you may use preg_match_all() as well
print_r($matches);

Output:

Array
(
    [0] => atm123456
)

PHP demo | Regex demo

edited Aug 28, 2014 at 13:55

hlscalon

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answered Aug 28, 2014 at 13:35

hex494D49

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Comments

Punitha Subramani · Accepted Answer · 2014-08-28 13:33:12Z

1

Can you try this

    $thestring='atm123456';
    $thestrToEx = explode(' ',$thestring );
    $thestrToExArr=array_walk($thestrToEx,'intval');
    $theValues=explode($thestrToExArr,$thestring);
    echo $thestrToExArr.$theValues[1];

answered Aug 28, 2014 at 13:33

Punitha Subramani

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Comments

Ram Sharma · Accepted Answer · 2014-08-28 13:39:10Z

1

in case of multiple value or repeated items. you can use preg_match_all like this

$string = "atm123456 with atm7890 items";
$pattern = "(atm\d+)";
preg_match_all($pattern, $string, $matches);
print_r($matches);

answered Aug 28, 2014 at 13:39

Ram Sharma

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3 Comments

Ram Sharma Over a year ago

sir, I just give the option in case of preg_match_all with string example, you were just considering preg_match only.

Luke Over a year ago

it's like the solution by hex494D49 btw it's ok

hex494D49 Over a year ago

It was already mentioned in my answer; even in my regex demo. I'm ok with that, just... weird to me man. Well, have fun ;)

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