php输出一段字符块
<?php
$str = <<<EOD
//some codes you want to write
//the end of the block should be a new line and have no space
EOD;
echo $str;
?>
<?php
$str = <<<EOD
//some codes you want to write
//the end of the block should be a new line and have no space
EOD;
echo $str;
?>
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