常用字符串函数_PHP

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//颠倒字串
print("abcdefg 颠倒 ");
print(strrev("abcdefg")."

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");

//小写字串
print("小写: ".strtolower("Hello World")."

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");

//大写字串
print("大写: ".strtoupper("Hello World")."

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");

//去空格
$text = " whitespace ";
print("\"" . trim($text) . "\"");
?>

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