Explication détaillée de l'interface SQLite PHP

Cet article partage principalement avec vous les connaissances de l'interface PHP SQLite, dans l'espoir de vous aider. Tout d'abord, jetons un coup d'œil aux connaissances pertinentes de l'API de l'interface PHP.

API d'interface PHP

Se connecter à la base de données

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }
?>

Créer une table

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }

   $sql =<<<EOF
      CREATE TABLE COMPANY
      (ID INT PRIMARY KEY     NOT NULL,
      NAME           TEXT    NOT NULL,
      AGE            INT     NOT NULL,
      ADDRESS        CHAR(50),
      SALARY         REAL);
EOF;

   $ret = $db->exec($sql);
   if(!$ret){
      echo $db->lastErrorMsg();
   } else {
      echo "Table created successfully\n";
   }
   $db->close();
?>

Opération INSERT

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }

   $sql =<<<EOF
      INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
      VALUES (1, &#39;Paul&#39;, 32, &#39;California&#39;, 20000.00 );

      INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
      VALUES (2, &#39;Allen&#39;, 25, &#39;Texas&#39;, 15000.00 );

      INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
      VALUES (3, &#39;Teddy&#39;, 23, &#39;Norway&#39;, 20000.00 );

      INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY)
      VALUES (4, &#39;Mark&#39;, 25, &#39;Rich-Mond &#39;, 65000.00 );
EOF;

   $ret = $db->exec($sql);
   if(!$ret){
      echo $db->lastErrorMsg();
   } else {
      echo "Records created successfully\n";
   }
   $db->close();
?>

Opération SELECT

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }

   $sql =<<<EOF
      SELECT * from COMPANY;
EOF;

   $ret = $db->query($sql);
   while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
      echo "ID = ". $row[&#39;ID&#39;] . "\n";
      echo "NAME = ". $row[&#39;NAME&#39;] ."\n";
      echo "ADDRESS = ". $row[&#39;ADDRESS&#39;] ."\n";
      echo "SALARY =  ".$row[&#39;SALARY&#39;] ."\n\n";
   }
   echo "Operation done successfully\n";
   $db->close();
?>

Opération UPDATE

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }
   $sql =<<<EOF
      UPDATE COMPANY set SALARY = 25000.00 where ID=1;
EOF;
   $ret = $db->exec($sql);
   if(!$ret){
      echo $db->lastErrorMsg();
   } else {
      echo $db->changes(), " Record updated successfully\n";
   }

   $sql =<<<EOF
      SELECT * from COMPANY;
EOF;
   $ret = $db->query($sql);
   while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
      echo "ID = ". $row[&#39;ID&#39;] . "\n";
      echo "NAME = ". $row[&#39;NAME&#39;] ."\n";
      echo "ADDRESS = ". $row[&#39;ADDRESS&#39;] ."\n";
      echo "SALARY =  ".$row[&#39;SALARY&#39;] ."\n\n";
   }
   echo "Operation done successfully\n";
   $db->close();
?>

Opération DELETE

<?php
   class MyDB extends SQLite3
   {
      function __construct()
      {
         $this->open(&#39;test.db&#39;);
      }
   }
   $db = new MyDB();
   if(!$db){
      echo $db->lastErrorMsg();
   } else {
      echo "Opened database successfully\n";
   }
   $sql =<<<EOF
      DELETE from COMPANY where ID=2;
EOF;
   $ret = $db->exec($sql);
   if(!$ret){
     echo $db->lastErrorMsg();
   } else {
      echo $db->changes(), " Record deleted successfully\n";
   }

   $sql =<<<EOF
      SELECT * from COMPANY;
EOF;
   $ret = $db->query($sql);
   while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
      echo "ID = ". $row[&#39;ID&#39;] . "\n";
      echo "NAME = ". $row[&#39;NAME&#39;] ."\n";
      echo "ADDRESS = ". $row[&#39;ADDRESS&#39;] ."\n";
      echo "SALARY =  ".$row[&#39;SALARY&#39;] ."\n\n";
   }
   echo "Operation done successfully\n";
   $db->close();
?>

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