PHP中提供了 这种方法详细表述了字符串的字面值,并在文本中保留了字符串的下划线和其他空格(包括缩进)。例如:
<span>1</span> <?<span>php </span><span>2</span> <span>$author</span> ='wixy'<span>; </span><span>3</span> <span>echo</span> <<<<span>_END </span><span>4</span> <span>Thisis a Headline </span><span>5</span> Thisis the first line. <span>6</span> Thisis the second line. <span>7</span> ---Writtenby <span>$author</span>. <span>8</span> <span>_END; </span><span>9</span> ?>
<span>1</span> <?<span>php </span><span>2</span> <span>$out</span> =<<<<span>_END </span><span>3</span> ..... <span>4</span> <span>_END; </span><span>5</span> ?>