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<form action="" method="post">
<input type="file" value="" name="file" size="20">
<input type="submit" value="check">
</form>
<?php
header("Content-type:text/html;charse=utf8");
if(isset($_POST['file'])){
$pic = $_POST['file'];
$pics = explode(".", $pic);
echo "上传文件的扩展名为：".$pics[count($pics)-1];
}
?>
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2022-07-29
2022-08-17
2022-11-06
2022-07-30
2022-08-17
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