we need to check an argument is closure in PclZip

[rpf5573]

When we create a zip file with PclZip class, we can pass an PCLZIP_CB_PRE_ADD callback function in create function. And PclZip checks that the callback function is exist or not like below.

<?php
// ----- Check that the value is a valid existing function
if (!function_exists($v_function_name)) {
  // ----- Error log
  PclZip::privErrorLog(PCLZIP_ERR_INVALID_OPTION_VALUE, "Function '".$v_function_name."()' is not an existing function for option '".PclZipUtilOptionText($p_options_list[$i])."'");

  // ----- Return
  return PclZip::errorCode();
}

I want to pass a closure, but function_exists($closure_function) is false.

So how about checking the callback function is closure also like below ?

<?php
// ----- Check that the value is a valid existing function
if (!function_exists($v_function_name) && !($v_function_name instanceof Closure)) {
  // ----- Error log
  PclZip::privErrorLog(PCLZIP_ERR_INVALID_OPTION_VALUE, "Function '".$v_function_name."()' is not an existing function for option '".PclZipUtilOptionText($p_options_list[$i])."'");

  // ----- Return
  return PclZip::errorCode();
}

When we create a zip file with PclZip class, we can pass an PCLZIP_CB_PRE_ADD callback function in create function.
And PclZip checks that the callback function is exist or not like below.

{{{php
----- Check that the value is a valid existing function
if (!function_exists($v_function_name)) {

----- Error log
PclZip::privErrorLog(PCLZIP_ERR_INVALID_OPTION_VALUE, "Function '".$v_function_name."()' is not an existing function for option '".PclZipUtilOptionText($p_options_list[$i])."'");

----- Return
return PclZip::errorCode();

}
}}}

I want to pass a closure, but function_exists($closure_function) is false.
So how about checking the callback function is closure also like below ?

{{{php
----- Check that the value is a valid existing function
if (!function_exists($v_function_name) && !($v_function_name instanceof Closure)) {

----- Error log
PclZip::privErrorLog(PCLZIP_ERR_INVALID_OPTION_VALUE, "Function '".$v_function_name."()' is not an existing function for option '".PclZipUtilOptionText($p_options_list[$i])."'");

----- Return
return PclZip::errorCode();

}
}}}

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