删除空的 < >
Remove empty < >
如果 < > 是空的，有没有办法删除它？
正文可以；
< > Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, < > when an <b>unknown printer</b> took <> a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries. < >
输出应该是；
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an <b>unknown printer</b> took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries.
您可以使用 preg_replace:
$text = "< > Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, < > when an <b>unknown printer</b> took <> a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries. < >";
$text = preg_replace('/<\s*\>/', '', $text);
echo $text;
输出：
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an <b>unknown printer</b> took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries.
如果您还想通过删除空 <> 来清理任何多个或悬挂的空格（在行首或行尾），您可以改用此方法：
$text = preg_replace(array('/<\s*\>/', '/\s+/', '/^\s|\s$/'), array('', ' ', ''), $text);
如果 < > 是空的，有没有办法删除它？
正文可以；
< > Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, < > when an <b>unknown printer</b> took <> a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries. < >
输出应该是；
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an <b>unknown printer</b> took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries.
您可以使用 preg_replace:
$text = "< > Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, < > when an <b>unknown printer</b> took <> a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries. < >";
$text = preg_replace('/<\s*\>/', '', $text);
echo $text;
输出：
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an <b>unknown printer</b> took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries.
如果您还想通过删除空 <> 来清理任何多个或悬挂的空格（在行首或行尾），您可以改用此方法：
$text = preg_replace(array('/<\s*\>/', '/\s+/', '/^\s|\s$/'), array('', ' ', ''), $text);