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# PEAR_Dependency::checkProgram()

PEAR_Dependency::checkProgram() -- Check external program

## Synopsis

    require_once 'PEAR/Dependency.php';

``mixed PEAR_Dependency::checkProgram` (mixed &$errmsg, string $program)`

## Description

External program check method. Looks for executable files in directories listed in the PATH environment variable.

## Parameter

mixed `&$errmsg`

  this variable will contains an error message, if check fail

string `$program`

  which program to look for

## Return value

`mixed` - `FALSE` if dependency could be resolved successfully(!); or an `PEAR_DEPENDENCY_*` constant in case of unresolved dependency.

## Note

This function can not be called statically.

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