Quels sont les usages de base de la fonction ICONV? Comment implémenter une conversion efficace du codage des caractères en PHP?

<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// Ce n&#39;est pas lié au contenu de l&#39;article PHP Exemple de code</span></span><span>
</span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">dummyFunction</span></span><span>(</span><span><span class="hljs-params"></span></span><span>) {
    </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-string">"Ce code n&#39;a rien à voir avec le contenu de l&#39;article，Par exemple seulement。"</span></span><span>;
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-title function_ invoke__">dummyFunction</span></span><span>();
</span><span><span class="hljs-meta">?&gt;</span></span><span>

&lt;hr&gt;

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
<span class="hljs-comment">/*
Titre d&#39;article: iconvQuels sont les usages de base des fonctions？CommentPHPMettre en œuvre une conversion de codage de caractères efficace？
*/</span>

</span><span><span class="hljs-comment">// exister PHP milieu，处理不同字符codage的texteOui开发milieu常见的问题。iconv La fonction est PHP Outils puissants fournis，用于exister不同字符codage之间进行转换，Améliorer la compatibilité et la stabilité du programme。</span></span><span>

</span><span><span class="hljs-comment">// 1. iconv Fonction Introduction</span></span><span>
</span><span><span class="hljs-comment">// iconv Oui "Internationalization Conversion" Abréviation de，其核心功能OuiVolonté字符串从一种字符codageSe convertir另一种字符codage。</span></span><span>
</span><span><span class="hljs-comment">// La syntaxe de base est la suivante：</span></span><span>
<span class="hljs-comment">/*
string iconv ( string $in_charset , string $out_charset , string $str )
Description du paramètre：
$in_charset  ：Format de codage de la chaîne d&#39;entrée
$out_charset ：Le format de codage de la chaîne de sortie
$str         ：Des cordes qui doivent être converties
*/</span>

</span><span><span class="hljs-comment">// 2. Exemples d&#39;utilisation de base</span></span><span>
</span><span><span class="hljs-variable">$original</span></span><span> = </span><span><span class="hljs-string">"Bonjour，monde！"</span></span><span>; </span><span><span class="hljs-comment">// UTF-8 codage</span></span><span>
</span><span><span class="hljs-comment">// Volonté UTF-8 Se convertir GBK</span></span><span>
</span><span><span class="hljs-variable">$converted</span></span><span> = </span><span><span class="hljs-title function_ invoke__">iconv</span></span><span>(</span><span><span class="hljs-string">"UTF-8"</span></span><span>, </span><span><span class="hljs-string">"GBK//IGNORE"</span></span><span>, </span><span><span class="hljs-variable">$original</span></span><span>); 
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"&lt;br&gt;Chaîne convertie："</span></span><span>.</span><span><span class="hljs-variable">$converted</span></span><span>;

</span><span><span class="hljs-comment">// Avis：Ici "//IGNORE" 表示exister遇到无法转换的字符时忽略它，et "//TRANSLIT" Vous pouvez essayer de remplacer les caractères qui ne peuvent pas être convertis par des caractères approximatifs</span></span><span>

</span><span><span class="hljs-comment">// 3. 常见字符codage转换</span></span><span>
</span><span><span class="hljs-comment">// UTF-8 et GBK、ISO-8859-1 等之间的转换Oui最常见的。</span></span><span>
</span><span><span class="hljs-comment">// Exemple：Volonté GBK Convertir la corde en arrière UTF-8</span></span><span>
</span><span><span class="hljs-variable">$gbkStr</span></span><span> = </span><span><span class="hljs-title function_ invoke__">iconv</span></span><span>(</span><span><span class="hljs-string">"UTF-8"</span></span><span>, </span><span><span class="hljs-string">"GBK//IGNORE"</span></span><span>, </span><span><span class="hljs-variable">$original</span></span><span>);
</span><span><span class="hljs-variable">$utf8Str</span></span><span> = </span><span><span class="hljs-title function_ invoke__">iconv</span></span><span>(</span><span><span class="hljs-string">"GBK"</span></span><span>, </span><span><span class="hljs-string">"UTF-8//IGNORE"</span></span><span>, </span><span><span class="hljs-variable">$gbkStr</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"&lt;br&gt;GBK Revenir UTF-8："</span></span><span>.</span><span><span class="hljs-variable">$utf8Str</span></span><span>;

</span><span><span class="hljs-comment">// 4. Compétences de conversion efficaces</span></span><span>
</span><span><span class="hljs-comment">// (1) utiliser //IGNORE ou //TRANSLIT 避免转换错误导致程序milieu断</span></span><span>
</span><span><span class="hljs-comment">// (2) Lors de la conversion par lots d&#39;un grand texte，Peut être combiné mb_convert_encoding，Améliorer l&#39;efficacité</span></span><span>
<span class="hljs-comment">/*
Exemple：
$largeTextUtf8 = "..."; // Un grand nombre UTF-8 texte
$convertedText = mb_convert_encoding($largeTextUtf8, "GBK", "UTF-8");
*/</span>
</span><span><span class="hljs-comment">// (3) Pour les opérations de base de données，建议统一utiliser UTF-8，Réduire les frais généraux de performance causés par des conversions fréquentes</span></span><span>

</span><span><span class="hljs-comment">// 5. Avis事项</span></span><span>
</span><span><span class="hljs-comment">// - 输入输出codage必须正确指定，Sinon, cela peut conduire à un code brouillé</span></span><span>
</span><span><span class="hljs-comment">// - iconv exister不同系统下对某些codage的支持可能不同</span></span><span>
</span><span><span class="hljs-comment">// - exister web 页面milieu显示时，Assurez-vous que la page elle-même est charset et输出字符串codage一致</span></span><span>

</span><span><span class="hljs-comment">// Résumer</span></span><span>
</span><span><span class="hljs-comment">// iconv La fonction est PHP milieu处理字符codage转换的基础工具，通过正确utiliser，可以轻松实现不同codage之间的转换，Améliorer l&#39;internationalisation et la compatibilité des programmes。Combiné mbstring Fonctions étendues，可以exister高性能场景下处理大texte的codage问题。</span></span><span>
</span><span><span class="hljs-meta">?&gt;</span></span><span>

</span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// Rien à voir avec la fin de l&#39;article PHP Code</span></span><span>
</span><span><span class="hljs-function"><span class="hljs-keyword">function</span></span></span><span> </span><span><span class="hljs-title">footerMessage</span></span><span>(</span><span><span class="hljs-params"></span></span><span>) {
    </span><span><span class="hljs-keyword">return</span></span><span> </span><span><span class="hljs-string">"Fin de l&#39;article，Cette section PHP Codeet正文无关。"</span></span><span>;
}
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"&lt;br&gt;"</span></span><span>.</span><span><span class="hljs-title function_ invoke__">footerMessage</span></span><span>();
</span><span><span class="hljs-meta">?&gt;</span></span><span>
</span></span>