Question

I need to replace text starting with ‘Title:’ and ending with ‘Article Body:’ using preg_replace or other way. Replaced text will not be contain above quoted words.

eg:

Title:

sample text 1

Article Body:

sample text 2

Should output only

sample text 2

How can I do this with php?

Answer 1

Use positive/negative lookaheads.

$result = preg_replace('/(?<=Title:).*(?=Article Body:)/s', '\nTest\n', $subject);

The above regex will replace whatever is inside Title: … Article Body: with \nTest\n

Explanation :

"
(?<=                # Assert that the regex below can be matched, with the match ending at this position (positive lookbehind)
   Title:              # Match the characters “Title:” literally
)
.                   # Match any single character
   *                   # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
(?=                 # Assert that the regex below can be matched, starting at this position (positive lookahead)
   Article\ Body:      # Match the characters “Article Body:” literally
)
"