diff --git a/PHPCI/Helper/BuildInterpolator.php b/PHPCI/Helper/BuildInterpolator.php
new file mode 100644
index 00000000..d4609793
--- /dev/null
+++ b/PHPCI/Helper/BuildInterpolator.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace PHPCI\Helper;
+
+use PHPCI\Model\Build;
+
+class BuildInterpolator
+{
+    /**
+     * An array of key => value pairs that will be used for
+     * interpolation and environment variables
+     * @var mixed[]
+     * @see setupInterpolationVars()
+     */
+    protected $interpolation_vars = array();
+
+    /**
+     * Sets the variables that will be used for interpolation.
+     * @param Build $build
+     * @param string $buildPath
+     * @param string $phpCiUrl
+     */
+    public function setupInterpolationVars(Build $build, $buildPath, $phpCiUrl)
+    {
+        $this->interpolation_vars = array();
+        $this->interpolation_vars['%PHPCI%'] = 1;
+        $this->interpolation_vars['%COMMIT%'] = $build->getCommitId();
+        $this->interpolation_vars['%PROJECT%'] = $build->getProjectId();
+        $this->interpolation_vars['%BUILD%'] = $build->getId();
+        $this->interpolation_vars['%PROJECT_TITLE%'] = $build->getProjectTitle();
+        $this->interpolation_vars['%BUILD_PATH%'] = $buildPath;
+        $this->interpolation_vars['%BUILD_URI%'] = $phpCiUrl . "build/view/" . $build->getId();
+        $this->interpolation_vars['%PHPCI_COMMIT%'] = $this->interpolation_vars['%COMMIT%'];
+        $this->interpolation_vars['%PHPCI_PROJECT%'] = $this->interpolation_vars['%PROJECT%'];
+        $this->interpolation_vars['%PHPCI_BUILD%'] = $this->interpolation_vars['%BUILD%'];
+        $this->interpolation_vars['%PHPCI_PROJECT_TITLE%'] = $this->interpolation_vars['%PROJECT_TITLE%'];
+        $this->interpolation_vars['%PHPCI_BUILD_PATH%'] = $this->interpolation_vars['%BUILD_PATH%'];
+        $this->interpolation_vars['%PHPCI_BUILD_URI%'] = $this->interpolation_vars['%BUILD_URI%'];
+
+        putenv('PHPCI=1');
+        putenv('PHPCI_COMMIT=' . $this->interpolation_vars['%COMMIT%']);
+        putenv('PHPCI_PROJECT=' . $this->interpolation_vars['%PROJECT%']);
+        putenv('PHPCI_BUILD=' . $this->interpolation_vars['%BUILD%']);
+        putenv('PHPCI_PROJECT_TITLE=' . $this->interpolation_vars['%PROJECT_TITLE%']);
+        putenv('PHPCI_BUILD_PATH=' . $this->interpolation_vars['%BUILD_PATH%']);
+        putenv('PHPCI_BUILD_URI=' . $this->interpolation_vars['%BUILD_URI%']);
+    }
+
+    /**
+     * Replace every occurrence of the interpolation vars in the given string
+     * Example: "This is build %PHPCI_BUILD%" => "This is build 182"
+     * @param string $input
+     * @return string
+     */
+    public function interpolate($input)
+    {
+        $keys = array_keys($this->interpolation_vars);
+        $values = array_values($this->interpolation_vars);
+        return str_replace($keys, $values, $input);
+    }
+}
\ No newline at end of file