Re: [PHP] Simple reading a file and extract fields
Ronald Wiplinger wrote:
> I got a larger file which consists of lines with a defined length of 56
how large? for very big files it's dangerous to read them in all at once,
as was exampled in other replies. I would say that large in this case would
be anything bigger than 5 Mb (this is a very rough estimate, we could have
a whole thread devoted to this [issue])
> characters. Each line ends with a line feed (0A),
>
> From each line I want one field from position 1 ~ 5 and field 2 from
> position 7 ~ 46.
>
your uisng php5 I hope? if so (error checking code left as an
exercise to the reader):
low flying tip: http://php.net/
http://php.net/foreach
http://php.net/array_filter
http://php.net/explode
http://php.net/file_get_contents
http://php.net/substr
RTFM is a mantra not an insult!
> I tried:
>
> $myFile = "plaiso";
> $fh = fopen($myFile, 'r');
> $theDataLine = explode("\n",fgets($fh));
>
> echo "Field1Field2"; // headline
>
> for($i=0;$i
> $Field1 = substr($theDataLine[$i], 0, 5);
> $Field2 = substr($theDataLine[$i], 7, 46);
> echo "$Field1 $Field2";
> }
>
> It prints only the headline and the first record.
>
> What do I miss?
>
> bye
>
> Ronald
>
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Re: [PHP] Simple reading a file and extract fields
The fgets() function only reads a single line from the file. See the
below link for a way to read through all lines in the file. Then
after reading each line, use substr to pull out the fields.
http://us.php.net/manual/en/function.fgets.php
On Nov 13, 2007 8:53 AM, Ronald Wiplinger <[EMAIL PROTECTED]> wrote:
> I got a larger file which consists of lines with a defined length of 56
> characters. Each line ends with a line feed (0A),
>
> From each line I want one field from position 1 ~ 5 and field 2 from
> position 7 ~ 46.
>
> I tried:
>
> $myFile = "plaiso";
> $fh = fopen($myFile, 'r');
> $theDataLine = explode("\n",fgets($fh));
>
> echo "Field1Field2"; // headline
>
> for($i=0;$i
>$Field1 = substr($theDataLine[$i], 0, 5);
>$Field2 = substr($theDataLine[$i], 7, 46);
>echo "$Field1 $Field2";
> }
>
> It prints only the headline and the first record.
>
> What do I miss?
>
> bye
>
> Ronald
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
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