[英]JavaScript onClick, getting data (id) from a table (populated from a database with PHP) through function and button
[英]Trouble getting php data from database through javascript function
在我的php站點上,我想使用javascript從mysql數據庫每三秒檢索一次數據。
問題:當我SELECT * from msgtable
使用SELECT * from msgtable
檢索數據時,php和javascript startTime
似乎都不起作用。
JavaScript的:
setInterval(function() {
var link = document.getElementById("chg");
link.href = "http://google.com.pk";
link.innerHTML = "<?php dynamic(); ?>";
}, 3000);
function startTime() {
var today = new Date();
var s = today.getSeconds();
s = checkTime(s);
if( s == s+3 ) { alert("faraz"); }
document.getElementById('time').innerHTML= s;
t = setTimeout( function() { startTime() }, 500 );
}
function changeURL() {
var link = document.getElementById("chg");
link.href = "http://google.com.pk";
link.innerHTML = "Google Pakistan";
}
function checkTime( i ) {
if ( i < 10 ) {
i = "0" + i;
}
return i;
}
PHP:
<?php
$connection = mysql_connect("localhost","root","");
$db_select = mysql_select_db("msgs",$connection);
$result = mysql_query("SELECT * FROM msgtable", $connection);
function dynamic() {
echo "faraz";
while ( $row = mysql_fetch_array( $result ) ) {
echo $row['msgBody'] ;
}
}
?>
HTML:
<body onLoad="startTime()">
<div id="chg1"> 3 Seconds to Google Pakistan </div>
<a href="http://google.it" id="chg">Google Italia</a>
<!-- Hafiz Faraz Mukhtar-->
<div id="time"> Time </div>
<div class="publicOut">Faraz</div>
</body>
您無法通過JavaScript調用PHP函數,如下所示:
link.innerHTML = "<?php dynamic(); ?>";
您需要進行AJAX調用才能運行PHP腳本並返回結果。 我建議使用jQuery和$ .ajax,這使得這很容易。
你需要使用普通的ajax或jquery ajax。使用javascript setInterval()函數來設置間隔
這是一個示例jquery ajax方法
function request()
{
$.ajax ({
url : "";
data : {},
dataType : "" ,
success : function(success) {} ,
error : function() {}
});
}
setInterval()語法
setInterval(request,3000); // in milliseconds
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