| 651 |
an "a" in the subject), whereas it fails by default, for Perl compatibility. |
an "a" in the subject), whereas it fails by default, for Perl compatibility. |
| 652 |
</P> |
</P> |
| 653 |
<P> |
<P> |
| 654 |
(3) \U matches an upper case "U" character; by default \U causes a compile |
(3) \U matches an upper case "U" character; by default \U causes a compile |
| 655 |
time error (Perl uses \U to upper case subsequent characters). |
time error (Perl uses \U to upper case subsequent characters). |
| 656 |
</P> |
</P> |
| 657 |
<P> |
<P> |
| 658 |
(4) \u matches a lower case "u" character unless it is followed by four |
(4) \u matches a lower case "u" character unless it is followed by four |
| 659 |
hexadecimal digits, in which case the hexadecimal number defines the code point |
hexadecimal digits, in which case the hexadecimal number defines the code point |
| 660 |
to match. By default, \u causes a compile time error (Perl uses it to upper |
to match. By default, \u causes a compile time error (Perl uses it to upper |
| 661 |
case the following character). |
case the following character). |
| 662 |
</P> |
</P> |
| 663 |
<P> |
<P> |
| 664 |
(5) \x matches a lower case "x" character unless it is followed by two |
(5) \x matches a lower case "x" character unless it is followed by two |
| 665 |
hexadecimal digits, in which case the hexadecimal number defines the code point |
hexadecimal digits, in which case the hexadecimal number defines the code point |
| 666 |
to match. By default, as in Perl, a hexadecimal number is always expected after |
to match. By default, as in Perl, a hexadecimal number is always expected after |
| 667 |
\x, but it may have zero, one, or two digits (so, for example, \xz matches a |
\x, but it may have zero, one, or two digits (so, for example, \xz matches a |
| 668 |
binary zero character followed by z). |
binary zero character followed by z). |
| 669 |
<pre> |
<pre> |
| 670 |
PCRE_MULTILINE |
PCRE_MULTILINE |
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