How can I get at the matches when using preg_replace in PHP?

"You need to put the pattern in parentheses /([A-Z])/, like this:

preg_replace(""/([A-Z])/"", ""<span class=\""initial\"">$1</span>"", $str)"

"\0 will also match the entire matched expression without doing an explicit capture using parenthesis.

preg_replace(""/[A-Z]/"", ""<span class=\""initial\"">\\0</span>"", $str)

As always, you can go to php.net/preg_replace or php.net/<whatever search term> to search the documentation quickly. Quoth the documentation:

\0 or $0 refers to the text matched by the whole pattern."

"From the preg_replace documentation on php.net:

replacement may contain references of
the form \n or (since PHP 4.0.4) $n,
with the latter form being the
preferred one. Every such reference
will be replaced by the text captured
by the n'th parenthesized pattern.

See Flubba's example."

Use parentheses around your desired capture.

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