php function to convert string to camelcase
echo ucwords("hello world");
php function to convert string to camelcase
echo ucwords("hello world");
php camelcase to snake case
function from_camel_case($input) { $pattern = '!([A-Z][A-Z0-9]*(?=$|[A-Z][a-z0-9])|[A-Za-z][a-z0-9]+)!'; preg_match_all($pattern, $input, $matches); $ret = $matches[0]; foreach ($ret as &$match) { $match = $match == strtoupper($match) ? strtolower($match) : lcfirst($match); } return implode('_', $ret); } // Tests: foreach ([ 'simpleTest' => 'simple_test', 'easy' => 'easy', 'HTML' => 'html', 'simpleXML' => 'simple_xml', 'PDFLoad' => 'pdf_load', 'startMIDDLELast' => 'start_middle_last', 'AString' => 'a_string', 'Some4Numbers234' => 'some4_numbers234', 'TEST123String' => 'test123_string', ] as $test => $result) { $output = from_camel_case($test); if ($output === $result) { echo "Pass: $test => $result\n"; } else { echo "Fail: $test => $result [$output]\n"; } } /* Pass: simpleTest => simple_test Pass: easy => easy Pass: HTML => html Pass: simpleXML => simple_xml Pass: PDFLoad => pdf_load Pass: startMIDDLELast => start_middle_last Pass: AString => a_string Pass: Some4Numbers234 => some4_numbers234 Pass: TEST123String => test123_string */
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