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I need to develop a webportal which will display the images generated by a GIS software package. I my development I need to run gdal command inside php exec() function. but I don't know how to do this.

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it works under PHP 4, PHP 5. beside this you can use passthru command too.. passthru command execute an external program and display raw output.

exec — Execute an external program

Description

string exec ( string $command [, array &$output [, int &$return_var ]] )

exec() executes the given command.

there is an example here. but they are complaining that it works a bit slow.

<?php

// gdal_translate converts GIS data
// in this case, simply copy a GeoTIFF with no transforms
$command = 'gdal_translate /tmp/in.tif /tmp/out.tif';

$t0 = microtime(true);
exec($command);
$t1 = microtime(true);

printf("%.1f seconds", $t1 - $t0);
?>

i hope it helps you...

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    @Mehedi - Please mark this as accepted if it indeed solved your problem. – Chad Cooper Jun 1 '12 at 14:08

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