[英]how can we assign a javascript array from mysql database with the help of php?
I would like to know if we can select data from the database using php and assign it to a javascript array?我想知道我们是否可以使用 php 将数据库中的 select 数据分配给 javascript 数组? if so what would be the syntax?
如果是这样,语法是什么?
I wrote the code below but it is not working我写了下面的代码,但它不起作用
$js_array = "[";
$result = mysql_query("SELECT item_name FROM tbl_item");
while( $row=mysql_fetch_array($result, MYSQL_NUM) ) {
$js_array .= $row[0];
$js_array .= ",";
}
$js_array{ strlen($js_array)-1 } = ']';
?>
<script>
var cities = <?php echo $js_array; ?>
for(var i=0; i<4;i++)
alert(cities.length);
</script>
The simplest approach is converting to JSON with json_encode :最简单的方法是使用json_encode转换为JSON :
// with $js_array being a true array
var cities = <?php echo json_encode($js_array)?>;
Note, that there are esoteric cases , where this solution might not work.请注意,在某些深奥的情况下,此解决方案可能不起作用。 On the other hand, the advantage is, that json_encode takes over all quoting needs.
另一方面,优点是 json_encode 接管了所有引用需求。
Use json_encode使用json_encode
You should not echo the array object.您不应回显数组 object。
Iterate the array and echo the value.迭代数组并回显该值。
<?php foreach( $js_array as $value) echo "'$value',"; ?>
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