php - How to replace numbers in string with link containing the same number -

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i have simple html page, containing lists of numbers. this:

look @ following pages: 23, 509, 209, 11, 139, 68, 70-72, 50, 409-412

i want replace every number, or range hyperlink that:

<a href="www.mysite.com?page=23">23</a>, <a href="www.mysite.com?page=509">509</a> ..... <a href="www.mysite.com?page=409">409-412</a>

the numbers 2 , 3 digits , enclosed in commas except first , last. , there ranges 391-397

you can use php preg_replace() achieve want.

$original_string = 'look @ following pages: 23, 509, 209, 11, 139, 68, 70-72, 50, 409-412';  $updated_string = preg_replace(    '~((\d{2,3})(\-\d{2,3})?)~',     '<a href="//www.mysite.com?page=$2">$1</a>',     $original_string );  echo $updated_string;

see working here.

the () sections in first argument of preg_replace() can referenced in second argument $1, $2 etc... first enclosed section ($1) page number or page range ("23", "70-72"). second enclosed section ($2) page number or first number of page range.

there's plenty of resources more info on regex online, can play around regex i've written here.


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