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| 1 | <?php |
| 2 | |
| 3 | namespace App\Http\Services; |
| 4 | |
| 5 | use XmlWriter; |
| 6 | |
| 7 | class ArrayToXML |
| 8 | { |
| 9 | private $version; |
| 10 | |
| 11 | private $encoding; |
| 12 | |
| 13 | /** |
| 14 | * Construct ArrayToXML object with selected version and encoding |
| 15 | * |
| 16 | * @param string $xmlVersion XML Version, default 1.0 |
| 17 | * @param string $xmlEncoding XML Encoding, default UTF-8 |
| 18 | */ |
| 19 | public function __construct(string $xmlVersion = '1.0', string $xmlEncoding = 'UTF-8') |
| 20 | { |
| 21 | $this->version = $xmlVersion; |
| 22 | $this->encoding = $xmlEncoding; |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * Build an XML Data Set |
| 27 | * |
| 28 | * @param array $data Associative Array containing values to be parsed into an XML Data Set(s) |
| 29 | * @param string $startElement Root Opening Tag, default data |
| 30 | * @return string XML String containing values |
| 31 | * @return mixed Boolean false on failure, string XML result on success |
| 32 | */ |
| 33 | public function buildXML(array $data, string $startElement = 'InstancyWrapper'): string |
| 34 | { |
| 35 | if (! is_array($data)) { |
| 36 | $err = 'Invalid variable type supplied, expected array not found on line '.__LINE__.' in Class: '.__CLASS__.' Method: '.__METHOD__; |
| 37 | trigger_error($err); |
| 38 | |
| 39 | return false; //return false error occurred |
| 40 | } |
| 41 | $xml = new XmlWriter(); |
| 42 | $xml->openMemory(); |
| 43 | $xml->startDocument($this->version, $this->encoding); |
| 44 | $xml->startElement($startElement); |
| 45 | |
| 46 | $data = $this->writeAttr($xml, $data); |
| 47 | $this->writeEl($xml, $data); |
| 48 | |
| 49 | $xml->endElement(); //write end element |
| 50 | //returns the XML results |
| 51 | return $xml->outputMemory(true); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Write keys in $data prefixed with @ as XML attributes, if $data is an array. |
| 56 | * When an @ prefixed key is found, a '%' key is expected to indicate the element itself, |
| 57 | * and '#' prefixed key indicates CDATA content |
| 58 | * |
| 59 | * @param XMLWriter $xml object |
| 60 | * @param array $data with attributes filtered out |
| 61 | * @return array $data | $nonAttributes |
| 62 | */ |
| 63 | protected function writeAttr(XMLWriter $xml, array $data): array |
| 64 | { |
| 65 | if (is_array($data)) { |
| 66 | $nonAttributes = []; |
| 67 | foreach ($data as $key => $val) { |
| 68 | //handle an attribute with elements |
| 69 | if ($key[0] == '@') { |
| 70 | $xml->writeAttribute(substr($key, 1), $val); |
| 71 | } elseif ($key[0] == '%') { |
| 72 | if (is_array($val)) { |
| 73 | $nonAttributes = $val; |
| 74 | } else { |
| 75 | $xml->text($val); |
| 76 | } |
| 77 | } elseif ($key[0] == '#') { |
| 78 | if (is_array($val)) { |
| 79 | $nonAttributes = $val; |
| 80 | } else { |
| 81 | $xml->startElement(substr($key, 1)); |
| 82 | $xml->writeCData($val); |
| 83 | $xml->endElement(); |
| 84 | } |
| 85 | } elseif ($key[0] == '!') { |
| 86 | if (is_array($val)) { |
| 87 | $nonAttributes = $val; |
| 88 | } else { |
| 89 | $xml->writeCData($val); |
| 90 | } |
| 91 | } |
| 92 | //ignore normal elements |
| 93 | else { |
| 94 | $nonAttributes[$key] = $val; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | return $nonAttributes; |
| 99 | } else { |
| 100 | return $data; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Write XML as per Associative Array |
| 106 | * |
| 107 | * @param XMLWriter $xml object |
| 108 | * @param array $data Associative Data Array |
| 109 | */ |
| 110 | protected function writeEl(XMLWriter $xml, array $data) |
| 111 | { |
| 112 | foreach ($data as $key => $value) { |
| 113 | if (is_array($value) && ! $this->isAssoc($value)) { //numeric array |
| 114 | foreach ($value as $itemValue) { |
| 115 | if (is_array($itemValue)) { |
| 116 | $xml->startElement($key); |
| 117 | $itemValue = $this->writeAttr($xml, $itemValue); |
| 118 | $this->writeEl($xml, $itemValue); |
| 119 | $xml->endElement(); |
| 120 | } else { |
| 121 | $itemValue = $this->writeAttr($xml, $itemValue); |
| 122 | $xml->writeElement($key, "$itemValue"); |
| 123 | } |
| 124 | } |
| 125 | } elseif (is_array($value)) { //associative array |
| 126 | $xml->startElement($key); |
| 127 | $value = $this->writeAttr($xml, $value); |
| 128 | $this->writeEl($xml, $value); |
| 129 | $xml->endElement(); |
| 130 | } else { //scalar |
| 131 | $value = $this->writeAttr($xml, $value); |
| 132 | $xml->writeElement($key, "$value"); |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Check if array is associative with string based keys |
| 139 | * |
| 140 | * @param array $array Array to check |
| 141 | */ |
| 142 | protected function isAssoc(array $array): bool |
| 143 | { |
| 144 | return (bool) count(array_filter(array_keys($array), 'is_string')); |
| 145 | } |
| 146 | } |