PHP str_replace标签与使用数组

Question

I have the following str_replace code which takes a given comment string and replaces any instances with a dot followed by [++] with the word He with a capital letter. Otherwise it replaces with he with no capital letters.

$comment = str_replace(array(". [++]","[++]"), array(". He","he"), $comment);

Although this works in most cases. It doesnt work if my comment string has [++] tag in the beginning of the sentence or if the tag is after a line break or two. It only works if the dot is next to the tag.

Any ideas how I can get it to replace with the capital He if its after a line break or the first tag in beginning of the comment string?

Answer 1

Try the preg_replace() function ( http://php.net/manual/en/function.preg-replace.php ):

$comment = preg_replace(
    array("~^\[\+\+\]~", "~(\.\s+)\[\+\+\]~", "~\[\+\+\]~"),
    array("He", "$1He", "he"),
    $comment
);