如何去除字符串最后一个

$str = "aaa
bbb
ccc
ddd
";

回复讨论(解决方案)

$str = "aaa
bbb
ccc
ddd
";
echo substr($str, 0, -5);

如果用查找的方式呢？查找到最后一个
后删除

$str = "aaa
bbb
ccc
ddd
";
echo substr($str, 0, -5);

$str = "aaa
bbb
ccc
ddd
";
echo substr($str, 0, -5); 我想找个跟chop类似的函数，只不过chop只能去除空格或预定义的

$str = "aaa
bbb
ccc
ddd
___";echo strrev(join('', explode('>/rb  
 aaa
bbb
ccc
ddd___  
  rtrim($str,"
");  
 chop不就是rtrim么？