I dont understand your requirements but you can try this:
while(( ($contents=fread( $handle, 100 )) != '' )) {
for ($i=0; $i<100; $i++)
{if
{
...
}
else
if{
..
}
}
}
There may be a problem in the last read above.
If you are trying to count the occurance of A,G,C,T in the file using preg_grep
may be easier.
Regards,
Shinoj.
> To: [email protected]
> From: [email protected]
> Date: Sun, 31 Jan 2010 22:44:00 +0530
> Subject: [TwinCLinG] read and count only limited characters using php script
>
>
>
>
>
> Hi All
> the aim is to read and count only 100 characters from input text file
> containing characters of A, G, C, T....of 500 or more.... The PHP script
> which I appended here reads all the 500 or whatever is present in the input
> file. The help which I expect from the forum is to find and correct the
> mistake by which it can read and count only the limited number of characters
> to be set as a condition.
> <?php
> $file="co3.txt";
> $handle=fopen($file, 'r');
> $A=0;
> $G=0;
> $C=0;
> $T=0;
> $contents[] = '';
> while(!feof($handle)) {
> $contents[] = fread($handle, 100);
> }
> #echo($contents);
> { $readchar=fgetc($handle);
> $readchar=strtoupper($readchar);
> for ($i=0; $i<100; $i++)
> {
> #echo ($contents[$i]);
> if($contents[$i] == 'A' ) # && ($A++ <=100))
> {
>
> $A++;
> # if ( $A++ <= 100 ) {
> imagefilledrectangle($img, $x1, $y1, $x2, $y2, $green);
> /***to draw an image of thin vertical rectangular line for every characters
> read and counted which is secondary***/
> $x1=$x1+6;
> $x2=$x2+6;
> }
> else
> if ($contents[$i] == 'G' ) # ($G++ <=100))
> {
> $G++;
> # if ( $G++ <= 100 ) {
> imagefilledrectangle($img, $x1, $y1, $x2, $y2, $black);
> $x1=$x1+6;
> $x2=$x2+6;
> }
> else
> if ($contents[$i] == 'C' ) #($C++ <=100))
> {
>
> $C++;
> # if ( $C++ <= 100 ) {
> imagefilledrectangle($img, $x1, $y1, $x2, $y2, $blue);
> $x1=$x1+6;
> $x2=$x2+6;
> }
> else
> if ($contents[$i] == 'T' ) #($T++ <=100))
> {
> $T++;
> # if ( $T++ <= 100 ) {
> imagefilledrectangle($img, $x1, $y1, $x2, $y2, $red);
> $x1=$x1+6;
> $x2=$x2+6;
> }
> }
> fclose($handle);
> ?>
> I shall appreciate and honor your help.
> with regards
> s.mahalingam
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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