76 lines
2.8 KiB
PHP
76 lines
2.8 KiB
PHP
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<?php
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/**
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* Normalize non-ASCII characters to ASCII counterparts where possible.
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*
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* @param string $str
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* @return string
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*/
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function squashCharacters($str)
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{
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static $normalizeChars = null;
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if ($normalizeChars === null) {
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$normalizeChars = array(
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'À'=>'A', 'Á'=>'A', 'Â'=>'A', 'Ã'=>'A', 'Ä'=>'A', 'Å'=>'A', 'Æ'=>'Ae',
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'Ç'=>'C',
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'È'=>'E', 'É'=>'E', 'Ê'=>'E', 'Ë'=>'E',
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'Ì'=>'I', 'Í'=>'I', 'Î'=>'I', 'Ï'=>'I',
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'Ð'=>'Dj',
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'Ñ'=>'N',
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'Ò'=>'O', 'Ó'=>'O', 'Ô'=>'O', 'Õ'=>'O', 'Ö'=>'O', 'Ø'=>'O',
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'Ù'=>'U', 'Ú'=>'U', 'Û'=>'U', 'Ü'=>'U',
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'Ý'=>'Y',
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'Þ'=>'B',
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'ß'=>'Ss',
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'à'=>'a', 'á'=>'a', 'â'=>'a', 'ã'=>'a', 'ä'=>'a', 'å'=>'a', 'æ'=>'ae',
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'ç'=>'c', 'è'=>'e', 'é'=>'e', 'ê'=>'e', 'ë'=>'e',
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'ì'=>'i', 'í'=>'i', 'î'=>'i', 'ï'=>'i',
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'ð'=>'o', 'ñ'=>'n', 'ò'=>'o', 'ó'=>'o', 'ô'=>'o', 'õ'=>'o', 'ö'=>'o', 'ø'=>'o',
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'ù'=>'u', 'ú'=>'u', 'û'=>'u',
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'ý'=>'y',
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'þ'=>'b',
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'ÿ'=>'y',
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'Š'=>'S', 'š'=>'s', 'ś' => 's',
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'Ž'=>'Z', 'ž'=>'z',
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'ƒ'=>'f'
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);
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}
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return strtr($str, $normalizeChars);
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}
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/**
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* Convert all fields in $item to ASCII.
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*
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* Do this by first normalizing the characters (á -> a, ñ -> n, etc.). If any
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* non-ASCII characters remain, replace with a default value.
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*
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* @param array|object $item Array or object containing fields to convert
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* @param array|object $template Contains template fields
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* @param string $default Value to use when field not present in $template
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* @param array $ignore Optional list of fields to ignore.
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*/
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function convertFieldsToAscii(&$item, $template=null, $default='', array $ignore=null)
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{
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foreach ($item as $field => &$value) {
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// Skip fields in the $ignore array.
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if ($ignore && in_array($field, $ignore)) {
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continue;
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}
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// Normalize non-ASCII characters with ASCII counterparts.
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$value = squashCharacters($value);
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// Replace fields that contain non-ASCII characters with a default.
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if (mb_convert_encoding($value, 'ascii') !== $value) {
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// If template is provided, use the template field, if set.
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if ($template) {
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if (is_object($template) && isset($template->{$field})) {
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$value = $template->{$field};
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} elseif (is_array($template) && isset($template[$field])) {
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$value = $template[$field];
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} else {
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$value = $default;
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}
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} else {
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$value = $default;
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}
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}
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}
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}
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?>
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