


Copy the code The code is as follows:
//Create a new DOM document
$dom = new DomDocument();
//Create the departments tag at the root node
$departs = $dom ->createElement('departs');
$dom->appendChild($departs);
//Create department sub-tag under the departments tag
$depart = $dom->createElement('depart');
$departs->appendChild($depart);
//Create employees sub-tag under depart tag
$employees = $dom->createElement('employees');
$depart->appendChild($employees);
//Create the employee sub-tag under the employees tag
$employee = $dom->createElement('employee');
$employees->appendChild($employee);
//Create the serial_no sub-tag under the employees tag
$serial_no = $dom->createElement('serial_no');
$employee->appendChild($serial_no);
//Add value node 100001 for the serial_no label
$serial_no_value = $dom->createTextNode(' 100001');
$serial_no->appendChild($serial_no_value);
//Output XML data
echo $dom->saveXML();
?>
Copy code The code is as follows:
$dom = new DomDocument(); //Create DOM object
$dom->load('example.xml'); //Read XML file
$root = $dom-> ;documentElement; //Get the root of XML data
read_child($root); //Call the read_child function to read the root object
function read_child($node)
{
$children = $node->childNodes; //Get $ All child nodes of node
foreach($children as $e) //Loop to read each child node
{
if($e->nodeType == XML_TEXT_NODE) //If the child node is text type, output
{
echo $e->nodeValue."
";
}
else if($e->nodeType == XML_ELEMENT_NODE) //If the child node is a node object, call the function to process
{
read_child( $e);
}
}
}
?>
The above introduces the xlsx file converter PHP xml file operation implementation code (2), including the content of the xlsx file converter. I hope it will be helpful to friends who are interested in PHP tutorials.

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

PHPisusedforsendingemailsduetoitsbuilt-inmail()functionandsupportivelibrarieslikePHPMailerandSwiftMailer.1)Usethemail()functionforbasicemails,butithaslimitations.2)EmployPHPMailerforadvancedfeatureslikeHTMLemailsandattachments.3)Improvedeliverability

PHP performance bottlenecks can be solved through the following steps: 1) Use Xdebug or Blackfire for performance analysis to find out the problem; 2) Optimize database queries and use caches, such as APCu; 3) Use efficient functions such as array_filter to optimize array operations; 4) Configure OPcache for bytecode cache; 5) Optimize the front-end, such as reducing HTTP requests and optimizing pictures; 6) Continuously monitor and optimize performance. Through these methods, the performance of PHP applications can be significantly improved.

DependencyInjection(DI)inPHPisadesignpatternthatmanagesandreducesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itallowspassingdependencieslikedatabaseconnectionstoclassesasparameters,facilitatingeasiertestingandscalability.

CachingimprovesPHPperformancebystoringresultsofcomputationsorqueriesforquickretrieval,reducingserverloadandenhancingresponsetimes.Effectivestrategiesinclude:1)Opcodecaching,whichstorescompiledPHPscriptsinmemorytoskipcompilation;2)DatacachingusingMemc


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 Linux new version
SublimeText3 Linux latest version

WebStorm Mac version
Useful JavaScript development tools
