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<?php $js = '{ "BHS": { "text": "Beacon Hill School", "optgroup": "Kowloon" }, "HSK": { "text": "ESF International Kindergarten (Hillside)", "optgroup": "Hong Kong Island" }, "KJS": { "text": "Kowloon Junior School", "optgroup": "Kowloon" } }'; $json = json_decode($js); function sortByText($a, $b) { return ord($a['text'][0]) - ord($b['text'][0]); } usort($json, 'sortByText'); var_dump($json);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, stdClass given in /in/u7PTt:23 Stack trace: #0 /in/u7PTt(23): usort(Object(stdClass), 'sortByText') #1 {main} thrown in /in/u7PTt on line 23
Process exited with code 255.

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