Exclamation mark in front of variable - clarification needed. I've been working with PHP for quite a while now, but this was always a mystery to me, the correct use of the exclamation mark (negative sign) in front of variables. What does !$var indicate? Is var false, empty, not set etc.?
Lancaster is a city in Dallas County, Texas, United States. The population was 25,894 at the 2000 census. Locally, Lancaster is pronounced LANK-ist-er or LANK-us-ter, it is often mispronounce as LAN-CAS-ter. Lancaster is a suburb of Dallas, Texas and is part of the Best Southwest area, which includes Lancaster, Cedar Hill, DeSoto, and Duncanville. Most of the city is in Dallas County. But a extremely small southern section spills over into Ellis County.
Lancaster County, Virginia (VA) County population in 2014: 11,044 (all rural); it was 11,567 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 2,242. County owner-occupied free and clear houses and condos in 2010: 1,858. County owner-occupied houses and condos in 2000: 4,152.