php - String replacement via Regex -


i've created code writes settings config file (for wordpress eg wp-config), , wraps setting in comments.

such as:

  # start wp_memory_limit   define('wp_memory_limit', '250m');   # end wp_memory_limit

but inorder optimise code i'm looking drop comments altogether , directly write (and later delete) setting via regex. however, i'm not sure start this. appreciated.

essentially regex able idendify following string of text in config file:

  define('wp_memory_limit', 'xxxxxx');

where 'xxxxxx' alphanumerical value.


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