使用 PHP 将字符串的特定部分的逗号转换为分号

Question

I have a string which is such like,

$input = "div-item-2,4,maintype:social| heading:sdfsdf| social: 1, 2, 3 | table:Social| item:3| align:vertical| style:icon| isactive:1,8,0";

I would like to convert comma to semi-colon between |is start and end. This can be illustrated below by the below image,

So the string will be converted as as below,

$output = "div-item-2,4,maintype:social| heading:sdfsdf| social: 1; 2; 3 | table:Social| item:3| align:vertical| style:icon| isactive:1,8,0";

There are some other example is below,

$input = "div-item-0,4,maintype:menu| heading:Quick, Link| table:Menu | menuid:1| align:vertical| style:icon| isactive:1,0,0";

$output = "div-item-0,4,maintype:menu| heading:Quick; Link| table:Menu | menuid:1| align:vertical| style:icon| isactive:1,0,0";

Same case can be below,

$input = "div-item-1,4,maintype:text| heading: Name | title: Learn from here| logo:/photos/20/01.jpg| description: This is some description, so you can stay with us| isactive:1,4,0";

$output= "div-item-1,4,maintype:text| heading: Name | title: Learn from here| logo:/photos/20/01.jpg| description: This is some description; so you can stay with us| isactive:1,4,0";

Answer 1

You can use this regex to do what you want:

((\||(?<!^)\G)[^,|]*),(?=.*\|)

It looks for

• either a | , or the start of the string after the previous match ( \G ),
• followed by some number of non | or , characters,
• followed by a ,
• followed by some number of characters then a |

Demo on regex101

Note that \G would normally also match the start of string, the negative lookbehind (?<!^) prevents it doing that.

The characters between the start of match and the , are captured in group 1, and the replacement string is $1; . In PHP:

echo preg_replace('/((\||(?<!^)\G)[^,|]*),(?=.*\|)/', '$1;', $input);

Demo on 3v4l.org

Answer 2

try this..

function replaceSTR( $string, $search, $replace, $separator, $start, $end ){

  /*
   * note that this is base on your sample
   * string of course your string
   * search for ,
   * replace it with ;
   * your separator is |
   * in your sample your start is 1
   * end is 3
  */

  $result = array();
  $string = explode( $separator, $string );

  foreach( $string as $key => $value ){
   if( $key < $start || $key > $end ){
    $result[] = $value;
   }else{
    $result[] = str_replace(",",";",$value);
   }
  }
  return implode("|",$result);
}

Answer 3

Not sure, but maybe this expression might return the desired output:

$re = '/(?:^[^|]*|(?<=\|)(?:[^,]*)(?=\|)|[^|]*$|[^,\r\n]*)|(,)/m';
$str = 'div-item-2,4,maintype:social| heading:sdfsdf| social: 1, 2, 3 | table:Social| item:3| align:vertical| style:icon| isactive:1,8,0
div-item-0,4,maintype:menu| heading:Quick, Link| table:Menu | menuid:1| align:vertical| style:icon| isactive:1,0,0"
div-item-1,4,maintype:text| heading: Name | title: Learn from here| logo:/photos/20/01.jpg| description: This is some description, so you can stay with us| isactive:1,4,0';

preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);

$output = '';
foreach ($matches as $key => $value) {
    if ($value[1] == ',') {
        $output .= ';';
    } else {
        $output .= $value[0];
    }
}

var_dump($output);

Output

string(413) "div-item-2,4,maintype:social| heading:sdfsdf| social: 1; 2; 3 | table:Social| item:3| align:vertical| style:icon| isactive:1,8,0div-item-0,4,maintype:menu| heading:Quick; Link| table:Menu | menuid:1| align:vertical| style:icon| isactive:1,0,0"div-item-1,4,maintype:text| heading: Name | title: Learn from here| logo:/photos/20/01.jpg| description: This is some description; so you can stay with us| isactive:1,4,0"

---

If you wish to explore/simplify/modify the expression, it's been explained on the top right panel of regex101.com . If you'd like, you can also watch in this link , how it would match against some sample inputs.

---