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OK, je vais vous aider à écrire cet article, à le taper dans un style de langage PHP en fonction de vos besoins et à le séparer avec des lignes horizontales entre un contenu non pertinent et le corps. L'article sera terminé directement.
<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// Le contenu suivant n'a rien à voir avec le sujet de l'article，Seulement par exemple en place d'espace</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Bienvenue à monPHPSite Web de tutoriel！\n"</span></span><span>;
</span><span><span class="hljs-variable">$today</span></span><span> = </span><span><span class="hljs-title function_ invoke__">date</span></span><span>(</span><span><span class="hljs-string">"Y-m-d"</span></span><span>);
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Aujourd'hui est：<span class="hljs-subst">$today</span></span></span><span>\n";
</span><span><span class="hljs-meta">?></span></span><span>
<hr>
</span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// L'article commence</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"titre: existerPHPmilieuis_realetis_numericQuels sont les points de confusion communs et les différences de fonctions？\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// introduction</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"existerPHP开发milieu，Rencontre souvent la nécessité de juger des types de variables ou des types numériques。is_real()etis_numeric()Ce sont deux fonctions couramment utilisées，Mais de nombreux développeurs ont tendance à confondre leurs scénarios d'utilisation。本文将详细分析它们的区别et常见误区。\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// is_realfonction</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"un、is_realfonction\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"is_real()Ouiis_float()Alias de，用于检测变量Oui否Oui浮点数类型。Il distingue strictement les types，Renvoie uniquement pour de vrais numéros de point flottanttrue。\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// Exemple</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Exemple代码:\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> <span class="hljs-string"><<<CODE
\$a = 3.14;
var_dump(is_real(\$a)); // true
\$b = "3.14";
var_dump(is_real(\$b)); // false, 字符串即使看起来Oui浮点数也不算
\$c = 10;
var_dump(is_real(\$c)); // false, 整数类型不Oui浮点数
CODE</span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// is_numericfonction</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"deux、is_numericfonction\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"is_numeric()用于检测变量Oui否为数字ou数字字符串。Tant que la variable peut être interprétée comme un numéro juridique（Numéro entier ou point flottant），Reviendratrue。\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// Exemple</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Exemple代码:\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> <span class="hljs-string"><<<CODE
\$a = 3.14;
var_dump(is_numeric(\$a)); // true
\$b = "3.14";
var_dump(is_numeric(\$b)); // true
\$c = 10;
var_dump(is_numeric(\$c)); // true
\$d = "abc";
var_dump(is_numeric(\$d)); // false
CODE</span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// Points de confusion courants</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"trois、Points de confusion courants\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"1. Type de rigueur：is_real()Jugez uniquement le type de point flottant，etis_numeric()Peut accepter les chaînes numériques。\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"2. Jugement du numéro de corde：'123'ou'3.14'，is_realretourfalse，is_numericretourtrue。\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"3. Malententure du développeur：Certaines personnes pensentis_real会检查变量值Oui否可以作为数字，En fait, il ne se soucie que du type de données de la variable elle-même。\n\n"</span></span><span>;
</span><span><span class="hljs-comment">// en conclusion</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"Quatre、Résumer\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"如果你需要判断un个变量的类型Oui否为浮点数，utiliseris_real()（ouis_float()）。\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"如果你希望判断un个变量Oui否能被当作数字utiliser，Comprend des chaînes numériques，utiliseris_numeric()。\n"</span></span><span>;
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"理解两者的差别可以避免类型判断milieu的逻辑错误。"</span></span><span>;
</span><span><span class="hljs-meta">?></span></span><span>
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