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Which attribute indicates that an input field must be filled out before submitting?

required="required" autofocus="autofocus" placeholder="text"

<input type="text" name="name1" required="required" />

Which CSS method increases or decreases the size of the HTML element (including its content)?

translate() scale() skew()

#some_id:hover {
  transform: scale(2, 1.5);
  -ms-transform: scale(2, 1.5);    /* IE 9 */
  -moz-transform: scale(2, 1.5);   /* Firefox */
}

Click on the Date object method that returns the day of the month.

setDate() getMonth() getDate()

var rightnow = new Date();
var day = rightnow.getDate();
alert(day);

Which function is used to upload a file on server?

is_file() move_uploaded_file() fopen()

if(move_uploaded_file($_FILES["field_name"]["tmp_name"], "dir/file_name")) {
  echo "The file succesfully uploaded";
}

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