Question

我有这个字符串：

525,294,475,215,365,745

我需要删除475 ..和逗号。如果我需要删除第一个数字我还需要删除下一个逗号，也是最后一个。我可以吗？一个正则表达式？ THX

Answer 1

$newStr = str_replace(',475', '525,294,475,215,365,745');

或者错误较少的方式：

$new = array();
$pieces = explode(',', '525,294,475,215,365,745');
foreach ($pieces as $piece) {
   if ($piece != 475) {
      $new[] = $piece;
   }
}

$newStr = implode(',', $new);

Answer 2

这是一个正则表达式：

$s = "525,294,475,215,365,745";
$s = preg_replace(',?475', '', $s);

Answer 3

$data = "525,294,475,215,365,745";

$parts = explode(',', $data);

for ($i = 0; $i < count($parts); $i++) {
    if ($parts[$i] == 475) {
        unset($parts[$i]);
    }
}

$newdata = join(',', $parts);

Answer 4

<?php
$bigString = "525,294,475,215,365,745";
$pos = strpos($bigString, ",");
while($pos != false) {
  $newString .= substr($bigString, 0, $pos);
  $bigString = substr($bigString, $pos + 1);
  $pos = strpos($bigString, ",");
}
echo $newString;
?>

Answer 5

function filterValue($index, &$a) 
{
    $key = array_search($index, $a);
    if ($key != false) {
        unset($a[$key]);
    }
}


// Original data
$data = "525,294,475,215,365,745";
$data = explode(',', $data);

filterValue('475', $data);
$output = implode(',', $data);

在php中替换字符串

5 个答案: