user3778578 user3778578 - 3 months ago 26
PHP Question

Get string between - Find all occurrences PHP

I found this function which findes data between two strings of text, html or whatever.

How can it be changed so it will find all occurrences? Every data between every occurrence of $start [some-random-data] $end. I want all the [some-random-data] of the document (It will always be different data).

function getStringBetween($string, $start, $end) {
$string = " ".$string;
$ini = strpos($string,$start);
if ($ini == 0) return "";
$ini += strlen($start);
$len = strpos($string,$end,$ini) - $ini;
return substr($string,$ini,$len);
}

Answer

One possible approach:

function getContents($str, $startDelimiter, $endDelimiter) {
  $contents = array();
  $startDelimiterLength = strlen($startDelimiter);
  $endDelimiterLength = strlen($endDelimiter);
  $startFrom = $contentStart = $contentEnd = 0;
  while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
    $contentStart += $startDelimiterLength;
    $contentEnd = strpos($str, $endDelimiter, $contentStart);
    if (false === $contentEnd) {
      break;
    }
    $contents[] = substr($str, $contentStart, $contentEnd - $contentStart);
    $startFrom = $contentEnd + $endDelimiterLength;
  }

  return $contents;
}

Usage:

$sample = '<start>One<end>aaa<start>TwoTwo<end>Three<start>Four<end><start>Five<end>';
print_r( getContents($sample, '<start>', '<end>') );
/*
Array
(
    [0] => One
    [1] => TwoTwo
    [2] => Four
    [3] => Five
)
*/ 

Demo.

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