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>str_pad</H1
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NAME="AEN227076"
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><P
> (PHP 4 >= 4.0.1, PHP 5)</P
>str_pad --
Pad a string to a certain length with another string
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><H2
>Description</H2
>string <B
CLASS="methodname"
>str_pad</B
> ( string input, int pad_length [, string pad_string [, int pad_type]] )<BR
></BR
><P
> This functions returns the <CODE
CLASS="parameter"
>input</CODE
> string
padded on the left, the right, or both sides to the specified
padding length. If the optional argument
<CODE
CLASS="parameter"
>pad_string</CODE
> is not supplied, the
<CODE
CLASS="parameter"
>input</CODE
> is padded with spaces, otherwise it
is padded with characters from <CODE
CLASS="parameter"
>pad_string</CODE
>
up to the limit.
</P
><P
> Optional argument <CODE
CLASS="parameter"
>pad_type</CODE
> can be
<TT
CLASS="constant"
><B
>STR_PAD_RIGHT</B
></TT
>, <TT
CLASS="constant"
><B
>STR_PAD_LEFT</B
></TT
>,
or <TT
CLASS="constant"
><B
>STR_PAD_BOTH</B
></TT
>. If
<CODE
CLASS="parameter"
>pad_type</CODE
> is not specified it is assumed to
be <TT
CLASS="constant"
><B
>STR_PAD_RIGHT</B
></TT
>.
</P
><P
> If the value of <CODE
CLASS="parameter"
>pad_length</CODE
> is negative or
less than the length of the input string, no padding takes place.
</P
><P
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><P
><B
>例 1. <B
CLASS="function"
>str_pad()</B
> example</B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br />$input </font><font color="#007700">= </font><font color="#DD0000">"Alien"</font><font color="#007700">;<br />echo </font><font color="#0000BB">str_pad</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">); </font><font color="#FF8000">// produces "Alien "<br /></font><font color="#007700">echo </font><font color="#0000BB">str_pad</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">, </font><font color="#DD0000">"-="</font><font color="#007700">, </font><font color="#0000BB">STR_PAD_LEFT</font><font color="#007700">); </font><font color="#FF8000">// produces "-=-=-Alien"<br /></font><font color="#007700">echo </font><font color="#0000BB">str_pad</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">, </font><font color="#DD0000">"_"</font><font color="#007700">, </font><font color="#0000BB">STR_PAD_BOTH</font><font color="#007700">); </font><font color="#FF8000">// produces "__Alien___"<br /></font><font color="#007700">echo </font><font color="#0000BB">str_pad</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">6 </font><font color="#007700">, </font><font color="#DD0000">"___"</font><font color="#007700">); </font><font color="#FF8000">// produces "Alien_"<br /></font><font color="#0000BB">?></font>
</font>
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</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
The <CODE
CLASS="parameter"
>pad_string</CODE
> may be truncated if the
required number of padding characters can't be evenly divided by
the <CODE
CLASS="parameter"
>pad_string</CODE
>'s length.
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