PHP | xml_parser_free()函数
先决条件: XML 基础
xml_parser_free()函数是PHP中的一个内置函数,用于释放 XML 解析器。
句法:
bool xml_parser_free( resource $parser )
参数:此函数接受所需的单个参数$parser 。它指定了 XML 解析器对 free 的引用。
返回值:此函数在成功时返回 True,在失败时返回 False。
笔记:
- 此函数适用于PHP 4.0.0 及更新版本。
- 这些示例可能不适用于在线 IDE。因此,尝试在本地服务器或PHP托管服务器上运行它。
gfg.xml 文件:
XML
user123
firstname lastname
+91-9876543210
I am John Doe. Live in Kolkata, India.
PHP
PHP
USER DATA
";
break;
case "USERNAME":
echo "Username: ";
break;
case "NAME":
echo "Name: ";
break;
case "PHONE":
echo "Phone no: ";
break;
case "DETAIL":
echo "More about user: ";
}
}
// Element handler function named "ending_handler"
function ending_handler($parser, $element_name) {
echo "
";
}
// Character handler function named "char_handler"
function char_handler($parser, $data) {
echo $data;
}
// Setting element handlers
xml_set_element_handler($parser, "starting_handler",
"ending_handler");
// Setting character data handler
xml_set_character_data_handler($parser, "char_handler");
// Opening xml file
$filePointer = fopen("gfg.xml", "r");
// Reading xml file
while( $data = fread($filePointer, 4096) ) {
xml_parse($parser, $data, feof($filePointer)) or
// Display error while xml parsing
die (sprintf("XML Error: %s at line %d",
// Error string
xml_error_string(xml_get_error_code($parser)),
// Error line number
xml_get_current_line_number($parser)));
}
// Free to xml parser
xml_parser_free($parser);
// Closing file stream
fclose($filePointer);
?>
方案一:
PHP
输出:
user123
firstname lastname
+91-9876543210
I am John Doe. Live in Kolkata, India.
方案二:
PHP
USER DATA
";
break;
case "USERNAME":
echo "Username: ";
break;
case "NAME":
echo "Name: ";
break;
case "PHONE":
echo "Phone no: ";
break;
case "DETAIL":
echo "More about user: ";
}
}
// Element handler function named "ending_handler"
function ending_handler($parser, $element_name) {
echo "
";
}
// Character handler function named "char_handler"
function char_handler($parser, $data) {
echo $data;
}
// Setting element handlers
xml_set_element_handler($parser, "starting_handler",
"ending_handler");
// Setting character data handler
xml_set_character_data_handler($parser, "char_handler");
// Opening xml file
$filePointer = fopen("gfg.xml", "r");
// Reading xml file
while( $data = fread($filePointer, 4096) ) {
xml_parse($parser, $data, feof($filePointer)) or
// Display error while xml parsing
die (sprintf("XML Error: %s at line %d",
// Error string
xml_error_string(xml_get_error_code($parser)),
// Error line number
xml_get_current_line_number($parser)));
}
// Free to xml parser
xml_parser_free($parser);
// Closing file stream
fclose($filePointer);
?>
输出:
USER DATA
Username: user123
Name: firstname lastname
Phone no: +91-9876543210
More about user: I am John Doe. Live in Kolkata, India.
参考: https://www. PHP.net/manual/en/ 函数.xml-parser-free。 PHP