将PHP变量传递给JavaScript以在jQuery.ajax中使用 [英] Passing a PHP variable to JavaScript to use in jQuery.ajax
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问题描述
我想将变量从PHP
传递到JavaScript
以在我的jQuery.ajax
调用中使用它.我现在已经尝试了很多东西,但是没有成功.
I'd like to pass a variable from PHP
to JavaScript
to use it inside my jQuery.ajax
-call. I've tried a lot of things now, but without success.
这是我当前的代码:
$( document ).ready(function() {
function getLog() {
ms = Date.now();
var chatlink = "<?php echo $clink; ?>";
$.ajax({
url: chatlink+ms,
dataType: 'text',
success: function(text) {
$("#chat").text(text, "<br />");
setTimeout(getLog, 500); // refresh every half second
}
})
}
// some more code here
<?php $clink = 'foo.php'; ?>
推荐答案
如何将PHP变量传递给JavaScript
建议:
将必须使用PHP生成的内容作为全局变量进行部署,并在脚本中使用它们以保持源代码的整洁.
Deploy the content you must generate with PHP as global variables and use them in your scripts to keep your source code clean.
<?php
error_reporting(-1);
$foo = 'bar'; #1
$arr_foo = array( 'bar', 'baz', 'blong' ); #2
$arr_js = array(); #3 | start collection
$arr_js['foo'] = $foo; #3 | extend collection ...
$arr_js['arrFoo'] = $arr_foo; #3
$arr_js['null'] = null; #3
$arr_js['bool'] = true; #3
$arr_js['int'] = 0; #3
$arr_js['float'] = 0.123; #3
echo "<script>
/* make sure to declare your name space if you haven't already */
window.yourApp = window.yourApp || {};
/* #1 deploy your PHP variable as markup
don't forget to wrap variables properly if nessecary */
window.yourApp.foo = '$foo';
/* #2 if you are not sure if the PHP variable contains signs that must be escaped
or have a non primitive type such as arrays then JSON is there to the rescue */
window.yourApp.arrFoo = " . json_encode( $arr_foo ) . ";
/* #3 if you have a lot of vars that you want to transfer to your JS you could
also collect them in an assoziative array and then deploy them all in one
as described above */
window.yourApp = " . json_encode( $arr_js ) . "; /* most convenient way IMHO */
console.log( window.yourApp );
</script>";
JavaScript文件
console.log( window.yourApp );
如何通过ajax获取PHP变量?
<?php $arr_js = array(
'foo' => 'bar',
'arrFoo' => array( 'bar', 'baz', 'blong' ),
'null' => null,
'bool' => true,
'int' => 0,
'float' => 0.123,
'two way magic :)' => $_POST['yourApp']['coming from sender']
);
echo json_encode( $arr_js );
// lets assume the name of this file is "ajax-json.php"
JavaScript文件
// must be located in the same directory as "ajax-json.php" in this setup
// make sure jQuery is available!
jQuery.ajax({
method: 'POST',
url: 'ajax-json.php',
dataType: 'json',
data: {yourApp: {'coming from sender': 'pure awesomeness'}},
success: function( response ) {
console.log( response )
}
})
- json_encode()
- JSON
- jQuery.ajax()
上面的说明实际上是一个编辑!
<!-- HTML in a PHP file -->
<?php $clink = 'foo.php'; ?>
<script>
$( document ).ready(function() {
function getLog() {
ms = Date.now();
var chatlink = "<?php echo $clink; ?>";
$.ajax({
url: chatlink+ms,
dataType: 'text',
success: function(text) {
$("#chat").text(text, "<br />");
setTimeout(getLog, 500); // refresh every half second
}
})
}
}
</script>
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