constructor Php The leading underscore of the constructor construct is double

constructor Php The leading underscore of the constructor construct is double_

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Release： 2016-07-29 08:41:22

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Definition and Usage

__construct() function creates a new SimpleXMLElement object.

If successful, the function returns an object. On failure, returns false.

Syntax

__construct(data,options,is_url,ns,is_prefix)

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Parameters	Description
data	Required. A well-formed XML string or the path or URL of an XML document.
options	Optional. Specifies additional Libxml parameters.
is_url	Optional. Specifies whether the data parameter is a URL. The default is false.
ns	optional.
is_prefix	Optional.

Return Value

Returns a SimpleXMLElement object representing the data.

Example

<?php
$xmlstring = <<<XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>
XML;

$xml = new <code>SimpleXMLElement($xmlstring)</code>;

echo $xml->body[0];
?>

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Output similar to:

Don't forget the meeting!<br>后来看construct的前_是一个，我靠，上次也是这个错误，忘了，现在记着了 <br>function __construct() <br>{} <br>不是 <br>function _construct() <br>{}

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The above introduces the constructor Php constructor function. The leading underscore of construct is double _, including the content of constructor. I hope it will be helpful to friends who are interested in PHP tutorials.