#str_replace() 函数使用一个字符串替换字符串中的另一些字符。
#语法:str_replace(find,replace,string,count)
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<?php
echo str_replace("world","John","Hello world!");
?>
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<?php
$arr = array("blue","red","green","yellow");
print_r(str_replace("red","pink",$arr,$i));
echo "Replacements: $i";
?>
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