Pdostatement :: debugdumpparams anzeigen Datentypfehler? Bringen Sie Schritt für Schritt bei, Probleme zu finden und zu beheben

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// Hier ist ein irrelevantes Inhaltsbeispiel，Es kann ein Initialisierungs- oder Konfigurationscode sein</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Beginnen Sie mit der Ausführung des Skripts...<br>"</span></span><span>;
</span><span><span class="hljs-title function_ invoke__">date_default_timezone_set</span></span><span>(</span><span><span class="hljs-string">'Asia/Shanghai'</span></span><span>);
</span><span><span class="hljs-comment">// Beispiel für eine Verbindung zu einer Datenbank</span></span><span>
</span><span><span class="hljs-keyword">try</span></span><span> {
    </span><span><span class="hljs-variable">$pdo</span></span><span> = </span><span><span class="hljs-keyword">new</span></span><span> </span><span><span class="hljs-title function_ invoke__">PDO</span></span><span>(</span><span><span class="hljs-string">'mysql:host=localhost;dbname=testdb;charset=utf8mb4'</span></span><span>, </span><span><span class="hljs-string">'root'</span></span><span>, </span><span><span class="hljs-string">'password'</span></span><span>);
    </span><span><span class="hljs-variable">$pdo</span></span><span>-></span><span><span class="hljs-title function_ invoke__">setAttribute</span></span><span>(PDO::</span><span><span class="hljs-variable constant_">ATTR_ERRMODE</span></span><span>, PDO::</span><span><span class="hljs-variable constant_">ERRMODE_EXCEPTION</span></span><span>);
} </span><span><span class="hljs-keyword">catch</span></span><span> (PDOException </span><span><span class="hljs-variable">$e</span></span><span>) {
    </span><span><span class="hljs-keyword">die</span></span><span>(</span><span><span class="hljs-string">"Die Datenbankverbindung ist fehlgeschlagen："</span></span><span> . </span><span><span class="hljs-variable">$e</span></span><span>-></span><span><span class="hljs-title function_ invoke__">getMessage</span></span><span>());
}
</span><span><span class="hljs-meta">?></span></span><span>

<hr>

<h2></span><span><span class="hljs-title class_">PDOStatement</span></span><span>::</span><span><span class="hljs-variable constant_">debugDumpParams</span></span><span> Datentypfehler anzeigen？Bringen Sie Schritt für Schritt bei, Probleme zu finden und zu beheben</h2>

<p>Im EinsatzPHPvonPDOBeim Betrieb der Datenbank，Entwickler verwenden es oft <code></span><span><span class="hljs-title class_">PDOStatement</span></span><span>::</span><span><span class="hljs-title function_ invoke__">debugDumpParams</span></span><span>()