Příklad 2.
Vytvoření obecné zpracující funkce pomocí
create_function()
function process($var1, $var2, $farr) { for ($f=0; $f < count($farr); $f++) echo $farr[$f]($var1,$var2)."\n"; }
// create a bunch of math functions $f1 = 'if ($a >=0) {return "b*a^2 = ".$b*sqrt($a);} else {return false;}'; $f2 = "return \"min(b^2+a, a^2,b) = \".min(\$a*\$a+\$b,\$b*\$b+\$a);"; $f3 = 'if ($a > 0 && $b != 0) {return "ln(a)/b = ".log($a)/$b;} else {return false;}'; $farr = array( create_function('$x,$y', 'return "some trig: ".(sin($x) + $x*cos($y));'), create_function('$x,$y', 'return "a hypotenuse: ".sqrt($x*$x + $y*$y);'), create_function('$a,$b', $f1), create_function('$a,$b', $f2), create_function('$a,$b', $f3) );
echo "\nUsing the first array of anonymous functions\n"; echo "parameters: 2.3445, M_PI\n"; process(2.3445, M_PI, $farr);
// now make a bunch of string processing functions $garr = array( create_function('$b,$a','if (strncmp($a,$b,3) == 0) return "** \"$a\" '. 'and \"$b\"\n** Look the same to me! (looking at the first 3 chars)";'), create_function('$a,$b','; return "CRCs: ".crc32($a)." , ".crc32(b);'), create_function('$a,$b','; return "similar(a,b) = ".similar_text($a,$b,&$p)."($p%)";') ); echo "\nUsing the second array of anonymous functions\n"; process("Twas brilling and the slithy toves", "Twas the night", $garr);
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