ThinkPHP/Library/Vendor/spyc/php4/5to4.php

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<?php

php5to4 ("../spyc.php", 'spyc-latest.php4');

function php5to4 ($src, $dest) {
  $code = file_get_contents ($src);
  $code = preg_replace ('#(public|private|protected)\s+\$#i', 'var \$', $code);
  $code = preg_replace ('#(public|private|protected)\s+static\s+\$#i', 'var \$', $code);
  $code = preg_replace ('#(public|private|protected)\s+function#i', 'function', $code);
  $code = preg_replace ('#(public|private|protected)\s+static\s+function#i', 'function', $code);
  $code = preg_replace ('#throw new Exception\\(([^)]*)\\)#i', 'trigger_error($1,E_USER_ERROR)', $code);
  $code = str_replace ('self::', '$this->', $code);
  $f = fopen ($dest, 'w');
  fwrite($f, $code);
  fclose ($f);
  print "Written to $dest.\n";
}