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                有兩個字符串(string)運算符。第一個是連接運算符(“.”),它返回其左右參數連接后的字符串。第二個是連接賦值運算符(“.=”),它將右邊參數附加到左邊的參數之后。更多信息見賦值運算符。 ~~~ <?php $a = "Hello "; $b = $a . "World!"; // now $b contains "Hello World!" $a = "Hello "; $a .= "World!"; // now $a contains "Hello World!" ?> ~~~ 參見字符串類型和字符串函數章節。
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