array_unshift

Nom:array_unshift

Catégorie:Tableau

Langage de programmation:php

Description en une ligne:Insérez un ou plusieurs éléments au début du tableau.

Exemple

Exemple 1

Insérez l'élément "bleu" dans le tableau:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"vert"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function"></span></span><mark><span class="token function">array_unshift</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bleu"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

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Exemple 2

Afficher la valeur de retour:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"vert"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_unshift</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bleu"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">))</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

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Exemple 3

Utilisez le nom de la clé numérique:

 <span class="token php language-php"><span class="token delimiter important"><? Php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token number">0</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"rouge"</span> <span class="token punctuation">,</span> <span class="token number">1</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"vert"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token function"></span></span><mark><span class="token function">array_unshift</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bleu"</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span>

Essayez-le vous-même

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