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.
People of Hispanic origin accounted for 53 percent of Lancaster County's population growth from 2010 to 2012. That's according to population estimates for July 1, 2012, released this month by the Census Bureau. While Lancaster County's overall population has grown 1.4 percent since the 2010 census - from 519,445 to 526,823 - its number of Hispanic residents alone climbed 8.7 percent. Local leaders attribute the surge to births among the Hispanic community as well as migration from Latin America and other parts of the U.S.