CODEWITHSUNDEEP
phpregex
s_p
s_p

Reputation: 4693

php re calculate numeric values of css string

I am trying to recalculate INT values of a CSS string.
PHP string: 

$str = "background-repeat:no-repeat; position:absolute; left:522px; top:422px; width:155px; height:178px;";

Then i examine each value 

$strArr= explode(";", $str);
// output:
Array
(
        [0] => background-repeat:no-repeat
        [1] =>  position:absolute
        [2] =>  left:522px
        [3] =>  top:422px
        [4] =>  width:155px
        [5] =>  height:178px
        [6] =>
)

From here I would like to run a process and change INTvalues that have PX. So this would affect items [2], [3], [4], [5]

my attempt

foreach ($strArr as $piece) {

  $item = preg_match("/\d/", $piece); // check if contains `INT`
  if($ss==1){
      // run a process here to change int values
  }

}
// reconstruct string
// ex: $newStr = "background-repeat:no-repeat; position:absolute; left:261px; top:211px; width:78px; height:89px;";

Any help would be appreciated, thank you.

Upvotes: 0

Views: 95

Answers (3)

Nishanth Matha
Nishanth Matha

Reputation: 6081

try:

$str = "background-repeat:no-repeat; position:absolute; left:522px; top:422px; width:155px; height:178px;";
$strArr= explode(";", $str);
foreach ($strArr as $piece) {

  $item = preg_match('/[0-9]+px/', $piece); // check if contains int followed by px
  if($item==1){
      $piece = preg_replace('/[0-9]+px/', '400px',$piece);
  }//here I'm replacing all the INT values to 400px
$myValue[]=$piece;
}
$formattedStr = implode($myValue,';');
echo $formattedStr; //the result string with all the px values changed to 400

Upvotes: 1

Hammer
Hammer

Reputation: 1582

You will match more precisely using the regex /(?<=:)\d+(?=px)/g , This will get you only the numeric part, You can then do the calculation.

Updated, try this.

<?php
$str = "background-repeat:no-repeat; position:absolute; test:0px; left:522px; top:422px; width:155px; height:178px;";
$strArr= explode(";", $str);
foreach ($strArr as $pieces => $piece) {
    $item = preg_match("/(?<=:)\d+(?=px)/", $piece, $match, PREG_OFFSET_CAPTURE);
    if ($match) {
        $intval = (int)$match[0][0];
        $offset = $match[0][1];
        $newVal = $intval + 100; // your calculation here
        $strArr[$pieces] = substr($piece, 0, $offset) . $newVal . 'px';
    }
}

Upvotes: 2

skrilled
skrilled

Reputation: 5371

$str = "background-repeat:no-repeat; position:absolute; left:522px; top:422px; width:155px; height:178px;";

// this regex pattern will take any number that ends with px, i.e. 500px, 1px, 20px
preg_match_all('/([0-9+])+px/', $str, $matches);

foreach($matches[0] as $match) {
  $intvalue = (int) $match;
  $str = str_replace($match, '500px', $str); // subsitute 500px for what it should be replaced with
}

// $str is now updated..

Upvotes: 1

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