substr_replace

Name:substr_replace

Category:String

Programming Language:php

One-line Description:Replace part of the string with another string.

Example

Example 1

Replace "Hello" with "world":

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"world"</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Example 2

Replace from the 6th position of the string (replace "world" with "Shanghai"):

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Shanghai"</span> <span class="token punctuation">,</span> <span class="token number">6</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Example 3

Replace from the 5th position at the end of the string (replace "world" with "Shanghai"):

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Shanghai"</span> <span class="token punctuation">,</span> <span class="token operator">-</span> <span class="token number">5</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Example 4

Insert "Hello" at the beginning of "world":

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Hello "</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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Example 5

Replace multiple strings at once. Replace "AAA" in each string with "BBB":

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$replace</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"1: AAA"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"2: AAA"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"3: AAA"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">implode</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">,</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token variable">$replace</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;BBB&#39;</span> <span class="token punctuation">,</span> <span class="token number">3</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>

Try it yourself