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\$\begingroup\$ How does that work with the dots? \$\endgroup\$L3viathan– L3viathan2017年06月04日 13:23:33 +00:00Commented Jun 4, 2017 at 13:23
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\$\begingroup\$ @L3viathan Dots denote concatenation. They are used to build long strings from single characters. \$\endgroup\$user63956– user639562017年06月04日 14:34:50 +00:00Commented Jun 4, 2017 at 14:34
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\$\begingroup\$ I know that, but does PHP just make strings from unassigned variable names, or how does that work? I see no quote chars. \$\endgroup\$L3viathan– L3viathan2017年06月04日 15:20:05 +00:00Commented Jun 4, 2017 at 15:20
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2\$\begingroup\$ @L3viathan Those characters are constants. If a constant has not been defined, PHP uses its name as the value. \$\endgroup\$user63956– user639562017年06月04日 15:48:18 +00:00Commented Jun 4, 2017 at 15:48