PHP Parse error: syntax error, unexpected T_ECHO in index.php on line 3
请帮忙指教，这是哪里出了问题？
<?php
"$data_int1 = 123;"
echo $data_int1;
echo "<br />";
"$data_int1 = -123;"
echo $data_int2;
echo "<br />";
"$data_int1 = 0132;"
echo $data_int3;
echo "<br />";
"$data_int1 = 0x123;"
echo $data_int4;
echo "<br />";
?>
