PHP get variable type php

Foreach fore each in javascript loop cycle example source code

var arr = new Array(1,2,3,4,5,6);// numbers or string put into array
for (var key in arr) {
    window.alert("My array"
                 + key
                 + " = "
                 + arr[key]);
}

// next example
arr.forEach(function(elem){
		console.log(elem);
	});

// next example
for (var i = 0; i < arr.length; i++) {
  alert (arr[i]);
}

// next example for GECKO MOZILLA FIREFOX
var soucet = 0;
var obj = {var1: 5, var2: 13, var3: 8};
for each (var item in obj) {
  soucet += item;
}
alert(soucet); // vysledek "26", coz je soucet 5+13+8

Each in jQuery get all document inputs type text and set value 0 if checkbox checked

function fc(th){
 if( th.checked ){
    $("input:text").each(
    function() {
        this.value = 0;
        this.disabled = true;
      }
    ); 

}else{
    $("input:text").each(
    function() {

        this.disabled = false;
      }
    ); 
}

<input type="checkbox"  id="idCheck"  onchange="fc(this);"> Checkbox 
 
<input type="text" size="1" id="id1"  value="0"  /> 

<input type="text" size="1" id="id2"  value="0"  /> 

Nejdříve javascript

</body>
 <script type="text/javascript">
    var s = new String();
    var bUtf8 = false;
    var m = document.getElementsByTagName("META");
    for(var i = 0; i < m.length; i++){
        s = m[i].content;
        s = s.toLowerCase();
        var nP = s.indexOf('charset');
        var nPutf = s.indexOf('utf-8');
        if(nP != (-1) && nPutf != (-1))
            bUtf8 = true;
    }

var httpRequestMy;
var sIE = "", sFF = "";

var nClientW = (parseInt(document.body.clientWidth));    
var nScrollW  = (parseInt(document.body.scrollWidth)); 
var nRozdil = nScrollW - nClientW;
if(nRozdil > 100 || bUtf8 == false){
    // IE/zbytek sveta
    if (window.ActiveXObject) {
      httpRequestMy = new ActiveXObject("Microsoft.XMLHTTP");
    sIE = "-IExplorer-";
    } else {
      httpRequestMy = new XMLHttpRequest();
    sFF = "-Firefox-and-others-";    
    }

    var d = new Date();
    var url = "//myweb.com/stat/error.php?mess=<?php echo $_SERVER [SCRIPT_NAME];?>-pageWidth-" 
    + nScrollW.toString() + "---clientWidth-" + nClientW.toString() 
    + "-date-" + d.toDateString()+ "-" + d.toTimeString() + sFF + sIE;
    if(bUtf8 == false)
     url = "//myweb.com/stat/error.php?mess=<?php echo $_SERVER [SCRIPT_NAME];?>-UTF-8-false";
    httpRequestMy.open("GET", url, true);     
    httpRequestMy.onreadystatechange= function () {processRequest(); } ;
    httpRequestMy.send(null);     
  }
  else {     
    //alert(nRozdil);
  }

/****************/
function processRequest() {
  if (httpRequestMy.readyState == 4) {
    if(httpRequestMy.status == 200) {
      var response = httpRequestMy.responseText;
      if (response == 'EMPTY') {
        alert('empty');      
  }
      else { 
        //alert('OK');          
        }
      } 
    }
    else {
    
//       alert("Error page loading "
//         + httpRequestMy.status +":"+ httpRequestMy.statusText);
    }
  }
 
</script> 

</html>
 

error.php může obsahovat takový kód

<?php
 function vytvorNovyAzapisDoSouboru($fname, $poleVstup)
 { // BEGIN function vytvorNovyAzapisDoSouboru
 	    if(file_exists($fname))unlink($fname);
       $fp = fopen($fname, "a");    
    if (flock($fp, LOCK_EX)) { // do an exclusive lock
			foreach ($poleVstup as $key=>$value) {
      if(strlen($value)>5)
      fwrite($fp, $value."
"); // D, d M Y   	
   }
 
			flock($fp, LOCK_UN); // release the lock
		} else {
			echo "Couldn't lock the file !";
		}

		fclose($fp);
		chmod($fname, 0777);
 } // END function vytvorNovyAzapisDoSouboru 
  
$mess = $_GET['mess'];  
  $poleVstup = array();
  if(file_exists('err_mess.txt')){
    $poleVstup = file('err_mess.txt');
  }
  array_push($poleVstup, $mess);
  //print_r($poleVstup);
 vytvorNovyAzapisDoSouboru('err_mess.txt', $poleVstup); 
  
?>

$country[0] = "cz"                                 
$country[1] = "sk"                                 
$country[2] = "de"                                 
$country[3] = "uk"                                 
$country[4] = "fr"                                 

// this do same 
$country[] =  "cz" 
$country[] =  "sk" 
$country[] =  "de" 
$country[] =  "uk" 
$country[] =  "fr" 

// or
$country = array('cz','sk','de','uk','fr');

// get array items count                         
$length = count($country); 

for($i=0;$i<$length;$i++){
  print $country[$i].'<br>';// cz sk de uk fr
}  

                                                 
// or like this                                  
$country[50] = 'ca';                             
$country[10] = 'fr';                             
$country[20] = 'us'                              
                                                 
// now country will index 51                     
$country[] = 'ru';  

// or 
$country = array('5'=>'cz','sk','de','uk','fr'); 
/*
Array
(
    [5] => cz
    [6] => sk
    [7] => de
    [8] => uk
    [9] => fr
)
*/                            
                                                 
// you can do this                               
$country["cz"] = 1571;                           
$country["sk"] = 1572;                           
$country["de"] = 1573;                           
$country["uk"] = 1574;                           
$country["fr"] = 1575;                           
                                                 
print $country["uk"]; // 1574                           
                                                 
                                                 
// print all items key and value                         
foreach ($country as $key => $value){            
	print $key; // cz, sk, de, uk, fr              
	print $value; // 1571, 1572,  1573, 1574, 1575 
}                                                

Ukázky zaokrouhlení čísla v JavaScript.

var num = 123.45678;
var rounded = Math.round(num); // out: 123
 
var num = 123.5269;
var rounded = Math.round(num); // out: 124

var num = -3.5269;
var rounded = Math.round(num); // out: -4

var num = 3.5269;
var rounded = Math.round(num * 100)/100; // out: 3.52

var num = 3.5269;
var rounded = Math.round(num * 1000)/1000; // out: 3.526

var num = 3.5269;
var rounded = num.toFixed(3); // out: 3.527

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