str_split
Convert strings to arrays
Split the string "Shanghai" into an array:
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token function">str_split</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Shanghai"</span> <span class="token punctuation">)</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
Use length parameter:
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token function">print_r</span> <span class="token punctuation">(</span> <span class="token function">str_split</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Shanghai"</span> <span class="token punctuation">,</span> <span class="token number">3</span> <span class="token punctuation">)</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>