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. Lancaster County is one of the most rapidly growing counties in the state. According to the census study, Lancaster County's population increased 2.7 percent, or by 13,872 residents, between 2010 and 2014. That makes Lancaster County the fourth fastest growing county in Pennsylvania, behind Cumberland, Centre and Chester Counties. York County.