how to show IM error info in php?

[linjuming]

I use exec function to debug the im code. but it can not show the error info,so if the code is not correct ,i must run in cmd to see the error info,it is painful for me every time. Is there any method to show the error info in php?

[fmw42]

read up about exec function arguments, one is a message array.

try this

<?php
exec("/usr/local/bin/convert -version",$out,$returnval);
print_r($out[0]);
?>

or

<?php
exec("/usr/local/bin/convert -list",$out,$returnval);
print_r($out);
?>

or use shell_exec as follows

<?php
$IM_version=shell_exec("/usr/local/bin/convert -version");
echo $IM_version
?>

[linjuming]

Thanks！ i see now.

[anthony]

How about stderr?

[linjuming]

seems it doesn't work.

[linjuming]

what is the meaning of "stderr" ?

[Bonzo]

This is what I do and uses stderr:

Code: Select all

<?php
$array=array();
echo "<pre>";
exec("convert null.png good.png 2>&1", $array); 
echo "<br>".print_r($array)."<br>"; 
echo "</pre>";
?> 

[linjuming]

thank you very much !