Sonar Source is a Java software dedicated to software analysis and quality insurance. Thanks to Sonar Source, developers and project managers can get an objective view of their project technical debt. Thanks to a close analysis of your source code, Sonar will leverage the multiple non quite-right code pieces (coding conventions violations, complex methods and classes, dead code...) that increase your technical debt. This technical debt can then be qualified with different severity levels, quantified with objective metrics and charts and monitored everyday. This session will introduce the concept of technical debt and the basics of Sonar Source and its related PHP plugin.