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$a = "ahoj"; $b = $a. "světe !"; / / nyní $b obsahuje "ahoj světe! "$a = "ahoj"; $a .= "světe !"; / / nyní $a obsahuje "ahoj světe! "
?php $a = "bonjour"; $b = $a. "monde !"; / / $b contient "bonjour monde! "$a = "bonjour"; $a = $a. "monde !"; / / $a contient "bonjour monde! "?