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, CA. Online Offers. Lancaster is the fifth-largest city in Los Angeles County, California, and the ninth-fastest growing city in the United States.[citation needed] Lancaster is the 30th largest city in California, and the 148th largest city in the United States. Lancaster is the principal city within the Antelope Valley. Lancaster is located approximately 70 miles (110 km) north (by road travel) of the city of Los Angeles in Southern California's Antelope Valley.