Here is the easiest way to call a Function, or Class method dinamically, with Name from a String, stored into a variable or array item.
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Click on the code to select it.
1.
Calling function with name stored into a variable use:
$variable($parameters)
<?php
function url($adr){
return 'http://'. $adr;
}
// variable with function name
$fun = 'url';
// calls the functions with name from $fun
$val = $fun('coursesweb.net/php-mysql/');
echo $val; // https://coursesweb.net/php-mysql/
2.
Calling function with name stored into a string in array item use:
$array["key"]($parameters)
<?php
function getSum($x, $y){
return $x + $y;
}
function hi(){
echo 'Hello Friend';
}
// array with function names
$arr = ['f1'=>'getSum', 'f2'=>'hi'];
// calls the functions with name from $arr array
$sum = $arr['f1'](12, 89);
echo $sum; // 101
echo $arr['f2'](); // Hello Friend
3.
Calling class method with name from string in variable (add the variable with the method name within " {} "):
$object->{$variable}($parameter)
<?php
// PHP Class
class Cls {
// class method
public function site($str){
return 'http://'. $str;
}
}
// varible with method name
$method = 'site';
$obC = new Cls;
$val = $obC->{$method}('coursesweb.net/');
echo $val; // https://coursesweb.net/
4.
Calling class method with name from string in array item (add the array item with the method name within " {} "):
$object->{$array['key']}($parameters)
<?php
// PHP Class
class Cls {
// class methods
public function getSum($x, $y){
return $x + $y;
}
public function hi(){
return 'Hello Friend';
}
}
// array with method names
$mts = ['m1'=>'getSum', 'm2'=>'hi'];
$obC = new Cls;
$sum = $obC->{$mts['m1']}(12, 89);
$msg = $obC->{$mts['m2']}();
echo $sum; // 101
echo $msg; // Hello Friend
Daily Test with Code Example
HTML
CSS
JavaScript
PHP-MySQL
Which HTML5 tag can be used to embed an external application (SWF, PDF) in web page?
<mark> <embed> <canvas><embed src="flash_game.swf" width="450" height="350" />
Which CSS pseudo-element adds a special style to the first line of a text?
:first-letter :before :first-line#id:first-line {
font-weight: bold;
color: blue;
}
Click on the window object property which gets or sets the URL of current page.
window.location window.self window.statusvar url = window.location;
alert(url);
Indicate the PHP function used to get the contents of a file or page and store it into a string.
fopen() file_put_contents() file_get_contents()$homepage = file_get_contents("http://coursesweb.net/");
echo $homepage;