Sophie: php-manual-pt_BR-5.2.4-1mdv2008.1 noarch

php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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>ltrim</H1
><DIV
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><P
>    (PHP 3, PHP 4, PHP 5)</P
>ltrim&nbsp;--&nbsp;
     Retira whitespace do início da string
    </DIV
><DIV
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NAME="AEN219742"
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><H2
>Descrição</H2
>string <B
CLASS="methodname"
>ltrim</B
> ( string str [, string charlist] )<BR
></BR
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
      O segundo parâmetro foi adicionado no PHP 4.1.0
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     Esta função retorna uma string com whitespace retirados do início 
     de <CODE
CLASS="parameter"
>str</CODE
>.
     Sem o segundo parâmetro,
     <B
CLASS="function"
>ltrim()</B
> retirará estes caracteres:
     
     <P
></P
><UL
><LI
><P
>&#13;        " " (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>32</TT
> 
        (<TT
CLASS="literal"
>0x20</TT
>)), um espaço normal.
       </P
></LI
><LI
><P
>&#13;        "\t" (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>9</TT
> 
        (<TT
CLASS="literal"
>0x09</TT
>)), uma tabulação.
       </P
></LI
><LI
><P
>&#13;        "\n" (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>10</TT
> 
        (<TT
CLASS="literal"
>0x0A</TT
>)), uma linha nova (line feed).
       </P
></LI
><LI
><P
>&#13;        "\r" (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>13</TT
>
        (<TT
CLASS="literal"
>0x0D</TT
>)), um retono de carro.
       </P
></LI
><LI
><P
>&#13;        "\0" (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>0</TT
> 
        (<TT
CLASS="literal"
>0x00</TT
>)), o byte <TT
CLASS="literal"
>NULL</TT
>.
       </P
></LI
><LI
><P
> 
        "\x0B" (<ACRONYM
CLASS="acronym"
>ASCII</ACRONYM
> <TT
CLASS="literal"
>11</TT
> 
        (<TT
CLASS="literal"
>0x0B</TT
>)), uma tabulação vertical.
       </P
></LI
></UL
>
    </P
><P
>&#13;     Você pode também especificar os caracteres que você quer retirar,
     por meio do parâmetro <CODE
CLASS="parameter"
>charlist</CODE
>.
     Simplesmente lista todos os caracteres que você quer que sejam retirados. 
     Com <TT
CLASS="literal"
>..</TT
> você pode especificar um ordem de caracteres.
    </P
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></A
><P
><B
>Exemplo 1. Exemplo do uso de <B
CLASS="function"
>ltrim()</B
></B
></P
><P
>&#13;      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$text </font><font color="#007700">= </font><font color="#DD0000">"\t\tThese are a few words :) ...&nbsp;&nbsp;"</font><font color="#007700">;<br /></font><font color="#0000BB">$trimmed </font><font color="#007700">= </font><font color="#0000BB">ltrim</font><font color="#007700">(</font><font color="#0000BB">$text</font><font color="#007700">);<br /></font><font color="#FF8000">// $trimmed = "These are a few words :) ...&nbsp;&nbsp;"<br /></font><font color="#0000BB">$trimmed </font><font color="#007700">= </font><font color="#0000BB">ltrim</font><font color="#007700">(</font><font color="#0000BB">$text</font><font color="#007700">, </font><font color="#DD0000">" \t."</font><font color="#007700">);<br /></font><font color="#FF8000">// $trimmed = "These are a few words :) ...&nbsp;&nbsp;"<br /></font><font color="#0000BB">$clean </font><font color="#007700">= </font><font color="#0000BB">ltrim</font><font color="#007700">(</font><font color="#0000BB">$binary</font><font color="#007700">, </font><font color="#DD0000">"\0x00..\0x1F"</font><font color="#007700">);<br /></font><font color="#FF8000">// trim the ASCII control characters at the beginning of $binary <br />// (from 0 to 31 inclusive)<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
>
     </P
></DIV
></TD
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><P
>&#13;     Veja também <A
HREF="function.trim.html"
><B
CLASS="function"
>trim()</B
></A
> e <A
HREF="function.rtrim.html"
><B
CLASS="function"
>rtrim()</B
></A
>.
    </P
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