去掉字符串中首尾逗号

Question

本帖最后由 uczone 于 2009-11-22 01:49:56 编辑

Answer 1

$a=",张三,李四,王五,张飞,李四,,,张三,大 话,";echo str_replace(' ', '', trim($a, ","));

Answer 2

去掉中间多余的逗号和首尾的逗号$s=",张三,李四,王五,张飞,李四,,,张三,大 话,";
preg_replace("/^,?([^,]{2,}),?$/g","$1,",$s);

Answer 3

$s=",张三,李四,王五,张飞,李四,,,张三,大 话,";
preg_replace("/^,?([^,]{2,}),?$/g","$1,",trim($s,','));

Answer 4

<?php
$str=",张三,李四,王五,张飞,李四,,,张三,大 话,";
$a = explode(",",substr($str,1,strlen($str)-1));
$b = array_unique($a);foreach($b as $k)
{
    echo "<script>alert('$k')</script>";
}
?>

Answer 5

去除多余的
<?php
$str=",张三,李四,王五,张飞,李四,,,张三,大 话,";
$str=preg_replace('/[,]{2,}/',',',$str); 
$a = explode(",",trim($str,','));
$b = array_unique($a);
foreach($b as $k)
{
    echo "<script>alert('$k')</script>";
}
?>

Answer 6

回复：chinmo 您好，
您提供的已经能替换，但能实现，字符中间的空格也替换吗？谢谢

Answer 7

<?php
$str=",张三,李四,王五,张飞,李四,,,张三,大 话,";
$str=preg_replace('/[,]{2,}/',',',$str); 
$str = preg_replace("/\s+/g","",$str);
$a = explode(",",trim($str,','));
$b = array_unique($a);
foreach($b as $k)
{
    echo "<script>alert('$k')</script>";
}
?>

Answer 8

感谢以上各位网友的热心解答和回复，问题已经解决了：
$str=",张三,李四,王五,张飞,李四,,,张三,大 话,";
$str=preg_replace('/[,]{2,}/',',',$str); 
$str = preg_replace("/\s/","",$str);
$a = explode(",",trim($str,','));
$b = array_unique($a);
foreach($b as $k)
{
    echo "<script>alert('$k')</script>";
}