以上就介绍了web 一个SQL管理员的web接口,包括了web方面的内容,希望对PHP教程有兴趣的朋友有所帮助。
/*************************************************************************************
* SQLAdmin v2.0 - An SQL Administration User Interface for the Web *
* Copyright (C) 1997-98 Alessandro Vernet
*************************************************************************************
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; if not, write to the *
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, *
* Boston, MA 02111-1307, USA. *
*************************************************************************************/
/* TODO:
* - Add sort order.
* - Add simple view.
* - Add some documentation.
*/
/* LIMITATIONS:
* - Works only with mSQL.
*/
/* HISTORY:
* - 97-11-05 (avernet) Corrected a bug with quote.
* - 98-01-01 (avernet) Added a sortColumn parameter to
* administrationTable function.
* - 98-03-14 (avernet) Added function addTable to enable users to
* add (but not modify) en entry to the database.
* - 98-05-19 (avernet) Submitted to PX.
* - 98-10-11 (avernet) Now SQLAdmin works with PHP3. The PHP2 version
* will not be mainteained anymore.
* - 98-10-11 (avernet) SQLAdmin is now distributed under the LGPL
* instead of MPL.
*/
function escapeforhtml ($string)
{
$result = $string;
//$result = ereg_replace ("\"", """, $result);
$result = ereg_replace (" $result = ereg_replace (">", ">", $result);
return $result;
}
function displayTuple ($fieldsNumber, $fieldNames,
$fieldLengths, $values, $mode)
{
$result = "";
$result .= "";
return $result;
}
function fieldFromType ($text, $type)
{
if ($type == "int" || $type == "uint" || $type == "real")
{ $result = $text; }
else
{ $result = "'" . AddSlashes ($text) . "'"; }
return $result;
}
function executeMsql ($database, $command)
{
/*echo "" . $command . "
";*/
msql ($database, $command);
}
function handleRemove ($database, $table, $fieldsNumber,
$fieldNames, $fieldLengths, $fieldTypes)
{
global $remove;
if ($remove != "")
{
$command = "DELETE FROM " . $table . " WHERE ";
$fieldIndex = 0;
while ($fieldIndex {
$fieldName = "old-" . $fieldNames [$fieldIndex];
global $$fieldName;
$command .= $fieldNames [$fieldIndex] . "=" .
fieldFromType ($$fieldName, $fieldTypes [$fieldIndex]);
if ($fieldIndex != $fieldsNumber - 1)
{ $command .= " AND "; }
$fieldIndex++;
}
executeMsql ($database, $command);
}
}
function handleUpdate ($database, $table, $fieldsNumber,
$fieldNames, $fieldLengths, $fieldTypes)
{
global $update;
if ($update != "")
{
$command = "UPDATE " . $table . " SET ";
$fieldIndex = 0;
while ($fieldIndex {
$fieldName = $fieldNames [$fieldIndex];
global $$fieldName;
$command .= $fieldName . "=" .
fieldFromType ($$fieldName, $fieldTypes [$fieldIndex]);
if ($fieldIndex != $fieldsNumber - 1)
{ $command .= ", "; }
$fieldIndex++;
}
$command .= " WHERE ";
$fieldIndex = 0;
while ($fieldIndex {
$fieldName = "old-" . $fieldNames [$fieldIndex];
global $$fieldName;
$command .= $fieldNames [$fieldIndex] . "=" .
fieldFromType ($$fieldName, $fieldTypes [$fieldIndex]);
if ($fieldIndex != $fieldsNumber - 1)
{ $command .= " AND "; }
$fieldIndex++;
}
executeMsql ($database, $command);
}
}
function handleAdd ($database, $table, $fieldsNumber,
$fieldNames, $fieldLengths, $fieldTypes)
{
global $add;
if ($add != "")
{
$command = "INSERT INTO " . $table . " (";
$fieldIndex = 0;
while ($fieldIndex {
$command .= $fieldNames [$fieldIndex];
if ($fieldIndex != $fieldsNumber - 1)
{ $command .= ", "; }
$fieldIndex++;
}
$command .= ") VALUES (";
$fieldIndex = 0;
while ($fieldIndex {
$fieldName = $fieldNames [$fieldIndex];
global $$fieldName;
$command .= fieldFromType ($$fieldName, $fieldTypes [$fieldIndex]);
if ($fieldIndex != $fieldsNumber - 1)
{ $command .= ", "; }
$fieldIndex++;
}
$command .= ")";
executeMsql ($database, $command);
}
}
function displayRemoveUpdate ($database, $table, $sortColumn,
$fieldsNumber, $fieldNames, $fieldLengths)
{
$result = "";
if ($sortColumn != "")
{ $sortColumn = " ORDER BY " . $sortColumn; }
$msqlresult = msql ($database, "SELECT * FROM " . $table . $sortColumn);
$tuplesNumber = msql_numrows ($msqlresult);
$tupleIndex = 0;
while ($tupleIndex {
$fieldIndex = 0;
while ($fieldIndex {
$values [$fieldIndex] = msql_result ($msqlresult, $tupleIndex,
$fieldNames [$fieldIndex]);
$fieldIndex++;
}
$result .= displayTuple ($fieldsNumber, $fieldNames,
$fieldLengths, $values, "modify");
$tupleIndex++;
}
return $result;
}
function displayAdd ($fieldsNumber, $fieldNames, $fieldLengths)
{
$result = "";
$fieldIndex = 0;
while ($fieldIndex {
$values [$fieldIndex] = "";
$fieldIndex++;
}
$result .= displayTuple ($fieldsNumber, $fieldNames,
$fieldLengths, $values, "add");
msql_close ();
return $result;
}
function administrationTable ($database, $table, $sortColumn)
{
$result = "";
msql_connect ( "localhost");
$msqlresult = msql ($database, "SELECT * FROM " . $table);
$fieldsNumber = msql_numfields ($msqlresult);
$msqlresult = msql_listfields ($database, $table);
$fieldIndex = 0;
while ($fieldIndex {
$fieldNames [$fieldIndex] = msql_fieldname ($msqlresult, $fieldIndex);
$fieldLengths [$fieldIndex] = msql_fieldlen ($msqlresult, $fieldIndex);
$fieldTypes [$fieldIndex] = msql_fieldtype ($msqlresult, $fieldIndex);
$fieldIndex++;
}
handleRemove ($database, $table, $fieldsNumber, $fieldNames, $fieldLengths, $fieldTypes);
handleUpdate ($database, $table, $fieldsNumber, $fieldNames, $fieldLengths, $fieldTypes);
handleAdd ($database, $table, $fieldsNumber, $fieldNames, $fieldLengths, $fieldTypes);
$result .= displayRemoveUpdate ($database, $table, $sortColumn, $fieldsNumber, $fieldNames,
$fieldLengths);
$result .= displayAdd ($fieldsNumber, $fieldNames, $fieldLengths);
return $result;
}
function addTable ($database, $table)
{
$result = "";
msql_connect ( "localhost");
$msqlresult = msql ($database, "SELECT * FROM " . $table);
$fieldsNumber = msql_numfields ($msqlresult);
$msqlresult = msql_listfields ($database, $table);
$fieldIndex = 0;
while ($fieldIndex {
$fieldNames [$fieldIndex] = msql_fieldname ($msqlresult, $fieldIndex);
$fieldLengths [$fieldIndex] = msql_fieldlen ($msqlresult, $fieldIndex);
$fieldTypes [$fieldIndex] = msql_fieldtype ($msqlresult, $fieldIndex);
$fieldIndex++;
}
handleAdd ($database, $table, $fieldsNumber, $fieldNames, $fieldLengths, $fieldTypes);
$result .= displayAdd ($fieldsNumber, $fieldNames, $fieldLengths);
return $result;
}
?>

PHP和Python各有优势,选择应基于项目需求。1.PHP适合web开发,语法简单,执行效率高。2.Python适用于数据科学和机器学习,语法简洁,库丰富。

PHP不是在消亡,而是在不断适应和进化。1)PHP从1994年起经历多次版本迭代,适应新技术趋势。2)目前广泛应用于电子商务、内容管理系统等领域。3)PHP8引入JIT编译器等功能,提升性能和现代化。4)使用OPcache和遵循PSR-12标准可优化性能和代码质量。

PHP的未来将通过适应新技术趋势和引入创新特性来实现:1)适应云计算、容器化和微服务架构,支持Docker和Kubernetes;2)引入JIT编译器和枚举类型,提升性能和数据处理效率;3)持续优化性能和推广最佳实践。

在PHP中,trait适用于需要方法复用但不适合使用继承的情况。1)trait允许在类中复用方法,避免多重继承复杂性。2)使用trait时需注意方法冲突,可通过insteadof和as关键字解决。3)应避免过度使用trait,保持其单一职责,以优化性能和提高代码可维护性。

依赖注入容器(DIC)是一种管理和提供对象依赖关系的工具,用于PHP项目中。DIC的主要好处包括:1.解耦,使组件独立,代码易维护和测试;2.灵活性,易替换或修改依赖关系;3.可测试性,方便注入mock对象进行单元测试。

SplFixedArray在PHP中是一种固定大小的数组,适用于需要高性能和低内存使用量的场景。1)它在创建时需指定大小,避免动态调整带来的开销。2)基于C语言数组,直接操作内存,访问速度快。3)适合大规模数据处理和内存敏感环境,但需谨慎使用,因其大小固定。

PHP通过$\_FILES变量处理文件上传,确保安全性的方法包括:1.检查上传错误,2.验证文件类型和大小,3.防止文件覆盖,4.移动文件到永久存储位置。

JavaScript中处理空值可以使用NullCoalescingOperator(??)和NullCoalescingAssignmentOperator(??=)。1.??返回第一个非null或非undefined的操作数。2.??=将变量赋值为右操作数的值,但前提是该变量为null或undefined。这些操作符简化了代码逻辑,提高了可读性和性能。


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