替换字符串每3个字符出现在PHP中

Question

Is there a php function that is able to replace when a character appear x time?

example

$string="a,b,c,d,e,f,g,h,i,j,k,l";

every 3 commas will append " "

a,b,c,
d,e,f,
g,h,i,
j,k,l

I have written this.

function addBreaks($string,$char,$count) {  
    $ii = 0;
    for ( $i = 0; $i < strlen($string); $i++){  
        if ($string[$i] == $char){
            $ii++;      
            }
        if ($ii == $char){      
            $ii = 0;

            }
        $string = $string[$i]+"
"+$string[$i+1]; 
        }
        return $string;
    }

Answer 1

Something like this could work (very rough):

function addLineBreaks( $str, $n = ',', $x = 3 ) {
    $sArr = str_split( $str );
    $output = '';
    $occ = 0;
    foreach( $sArr as $k=>$v ) {
        $output .= $v;          
        if( $v == $n ) {
            $occ++;
            if( $occ%$x == 0 ) $output .= "
";           
        }
    }

    return $output;
}

Use it like:

header("Content-Type:text/plain");
echo addLineBreaks( "a,b,c,d,e,f,g,h,i,j,k,l" );
// outputs:
//a,b,c,
//d,e,f,
//g,h,i,
//j,k,l