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例子:php的substr函数真是强大(substr.php3)

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2016-06-21 09:13:44854browse

函数


$rest = substr("abcdef", 1); // returns "bcdef"
echo 'substr("abcdef", 1) returns ' . $rest . "
";
$rest = substr("abcdef", 1, 3); // returns "bcd"
echo 'substr("abcdef", 1, 3) returns ' . $rest . "
";
$rest = substr("abcdef", -1); // returns "f"
echo 'substr("abcdef", -1) returns ' . $rest . "
";
$rest = substr("abcdef", -2); // returns "ef"
echo 'substr("abcdef", -2) returns ' . $rest . "
";
$rest = substr("abcdef", -3, 1); // returns "d"
echo 'substr("abcdef", -3, 1) returns ' . $rest . "
";
$rest = substr("abcdef", 1, -1); // returns "bcde"
echo 'substr("abcdef", 1, -1) returns ' . $rest . "
";
?>

具体的使用可以看PHP的Manual中的function.substr.html。



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