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.
Manvel, TX. Manvel is a city in Brazoria County, Texas, United States. The current population is approximately 7,160 as of April 2008, a 235% growth over the 3,046 population recorded in the last official US Census in 2000. Manvel is located at 29Â°28â²45â³N 95Â°21â²23â³W / 29.47917Â°N 95.35639Â°W / 29.47917; -95.35639 (29.479200, -95.356299). According to the United States Census Bureau, the city has a total area of 23.3 square miles (60.3 kmÂ²), all of it land.