Online PHP editor | rfc for e9odg

@ 2015-06-21T10:46:07Z

<?php

$functionDef = <<<'EOF'
<?php

  function notThisOne( $baz = 'boz') {}

  function foo ( Bar $bar, Baz $baz = 'string with, comma', $boz = ['something'] ) {

  }

EOF;

$function = 'foo';
$argument = 'baz';

if (!preg_match('/function\s+' . preg_quote($function) . '\s*\(\s*(?P<args>.*?)\)/is', $functionDef, $matches)) {
    throw new RuntimeException('Cound not find parameters for function ' . $function);
}

$tokens = token_get_all('<?php ' . $matches['args']);

// small state machine, better in a class
$foundArg = false;
$default = '';
while ($token = next($tokens)) {

    // find the argument first of all
    if (!$foundArg) {
        if (is_array($token) && $token[1] == '$'.$argument) {
            $foundArg = true;
        }
        continue;
    }

    // detect when we have got to the end of the definitoin
    if ($token === ',') {
        break;
    }

    // compile everything else into the string
    if (is_string($token)) {
        $default .= $token;
    }
    else {
        $default .= $token[1];
    }

}

var_dump($default);

Output for git.master, git.master_jit, rfc.property-hooks: string(23) " = 'string with, comma'"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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