public static function Escaper::requiresSingleQuoting in Plug 7

Determines if a PHP value would require single quoting in YAML.

Parameters

string $value A PHP value:

Return value

bool True if the value would require single quotes.

1 call to Escaper::requiresSingleQuoting()

Inline::dump in lib/Symfony/yaml/Symfony/Component/Yaml/Inline.php

Dumps a given PHP variable to a YAML string.

File

lib/Symfony/yaml/Symfony/Component/Yaml/Escaper.php, line 73

Class

Escaper

Escaper encapsulates escaping rules for single and double-quoted YAML strings.

Namespace

Symfony\Component\Yaml

Code

public static function requiresSingleQuoting($value) {

  // Determines if a PHP value is entirely composed of a value that would
  // require single quoting in YAML.
  if (in_array(strtolower($value), array(
    'null',
    '~',
    'true',
    'false',
    'y',
    'n',
    'yes',
    'no',
    'on',
    'off',
  ))) {
    return true;
  }

  // Determines if the PHP value contains any single characters that would
  // cause it to require single quoting in YAML.
  return preg_match('/[ \\s \' " \\: \\{ \\} \\[ \\] , & \\* \\# \\?] | \\A[ \\- ? | < > = ! % @ ` ]/x', $value);
}