Using exec to call system commands in PHP

This article mainly introduces the use of exec to call system commands in PHP. It has certain reference value. Now I share it with everyone. Friends in need can refer to it

ØQuestion: How to execute System commands or execute other files

ØMethod:

1,ModifyPHP.ini

disable_functions = exec

2,Modify permissions

Modify the script to be executed

chmod 777 home/ -R

If other files are executed, the permissions of the corresponding files and all directories above them should be changed to executable mode

3,Debugging

If the script execution fails, use the pipeline command, use 2>&1, the command will output the error during shell execution to the $output variable, and output the variable to analyze the error message

For example:

exec('convert a.jpg b.jpg', $output, $return_val);

Change to:

exec('convert a.jpg b.jpg 2>&1', $output, $return_val); print_r($output);

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