Question

I want to replace a string written bellow

AND ( (wp_usermeta.meta_key = 'first_name' AND CAST(wp_usermeta.meta_value AS CHAR) LIKE '%A%')
AND  (mt1.meta_key = 'wp_capabilities' AND CAST(mt1.meta_value AS CHAR) LIKE '%\"s2member\\_level2\"%') )

to

AND ( (wp_usermeta.meta_key = 'first_name' AND CAST(wp_usermeta.meta_value AS CHAR) LIKE 'A%')
AND  (mt1.meta_key = 'wp_capabilities' AND CAST(mt1.meta_value AS CHAR) LIKE '%\"s2member\\_level2\"%') )

In the above scring what I want to achieve is to replace %[a-zA-Z]% to [a-zA-Z]%

Answer 1

You need to capture the letter and insert in the replacement string again.

%([a-zA-Z])%

this will capture the letter because of the brackets around.

And replace with

$1%

$1 is the content of that capturing group

in php it looks then something like

$SourceString = preg_replace('/%([a-zA-Z])%/', '$1%', $SourceString);