File: function.ereg.html

package info (click to toggle)
php3 3%3A3.0.18-0potato1.1
links: PTS
area: main
in suites: potato
size: 17,736 kB
ctags: 11,198
sloc: ansic: 108,120; sh: 2,512; php: 2,024; yacc: 1,887; makefile: 1,038; perl: 537; pascal: 238; awk: 90; cpp: 28; sql: 11
file content (318 lines) | stat: -rw-r--r-- 4,595 bytes
parent folder | download | duplicates (3)
<HTML
><HEAD
><TITLE
>ereg</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
HREF="manual.html"><LINK
REL="UP"
TITLE="Regular Expression Functions (POSIX Extended)"
HREF="ref.regex.html"><LINK
REL="PREVIOUS"
TITLE="Regular Expression Functions (POSIX Extended)"
HREF="ref.regex.html"><LINK
REL="NEXT"
TITLE="ereg_replace"
HREF="function.ereg-replace.html"><META
NAME="HTTP_EQUIV"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="ref.regex.html"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="function.ereg-replace.html"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.ereg"
>ereg</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN33216"
></A
><P
>    (PHP3 , PHP4 )</P
>ereg&nbsp;--&nbsp;Regular expression match</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN33219"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN33221"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="function"
>ereg</B
></CODE
> (string pattern, string string [, array 
       regs])</CODE
></P
><P
></P
></DIV
><P
>&#13;     Searches a <TT
CLASS="parameter"
><I
>string</I
></TT
> for matches to the regular
     expression given in <TT
CLASS="parameter"
><I
>pattern</I
></TT
>.
    </P
><P
>&#13;     If matches are found for parenthesized substrings of
     <TT
CLASS="parameter"
><I
>pattern</I
></TT
> and the function is called with
     the third argument <TT
CLASS="parameter"
><I
>regs</I
></TT
>, the matches will
     be stored in the elements of the array
     <TT
CLASS="parameter"
><I
>regs</I
></TT
>. $regs[1] will contain the substring
     which starts at the first left parenthesis; $regs[2] will contain
     the substring starting at the second, and so on. $regs[0] will
     contain a copy of <TT
CLASS="parameter"
><I
>string</I
></TT
>.
    </P
><P
>&#13;     If <B
CLASS="function"
>ereg()</B
> finds any matches at all, $regs will
     be filled with exactly ten elements, even though more or fewer
     than ten parenthesized substrings may actually have matched.
     This has no effect on <B
CLASS="function"
>ereg()</B
>'s ability to
     match more substrings. If no matches are found, $regs will not be
     altered by <B
CLASS="function"
>ereg()</B
>.
    </P
><P
>&#13;     Searching is case sensitive.
    </P
><P
>&#13;     Returns true if a match for <TT
CLASS="parameter"
><I
>pattern</I
></TT
> was
     found in <TT
CLASS="parameter"
><I
>string</I
></TT
>, or false if no matches
     were found or an error occurred.
    </P
><P
>&#13;     The following code snippet takes a date in ISO format
     (YYYY-MM-DD) and prints it in DD.MM.YYYY format:
     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN33249"
></A
><P
><B
>Example 1. <B
CLASS="function"
>Ereg()</B
> Example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
>&#13;if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) {
    echo "$regs[3].$regs[2].$regs[1]";
} else {
    echo "Invalid date format: $date";
}
      </PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><P
>&#13;     See also <A
HREF="function.eregi.html"
><B
CLASS="function"
>eregi()</B
></A
>,
     <A
HREF="function.ereg-replace.html"
><B
CLASS="function"
>ereg_replace()</B
></A
>, and
     <A
HREF="function.eregi-replace.html"
><B
CLASS="function"
>eregi_replace()</B
></A
>.
    </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="ref.regex.html"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="manual.html"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.ereg-replace.html"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Regular Expression Functions (POSIX Extended)</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.regex.html"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>ereg_replace</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>