To use preg_replace, pass in the original string and a regular expression – the matching result will be returned. There is not much more to say about that method as you need to understand regular expressions to use it.
Here is a programmatic solution, possibly not the most efficient code, but gives you an indication of what it is doing.
$tagOne = "["; $tagTwo = "]"; $replacement = "Jainish Senjaliya"; $text = "Hello, my name is [NAME]"; $startTagPos = strrpos($text, $tagOne); $endTagPos = strrpos($text, $tagTwo); $tagLength = $endTagPos - $startTagPos + 1; $newText = substr_replace($text, $replacement, $startTagPos, $tagLength); echo $newText;
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