PHP中elseif与else if的区别

Posted 2020-10-05

在php中，正常情况下elseif和else if的用法及效果是一样的，但在使用带冒号的if语句时（也就是php替代）情况会有点不一样，比如：

<?php 
/*正确的写法*/ 
$a = 1; 
$b = 2; 
if ($a > $b): 
    echo ‘a is larger than b‘; 
elseif ($a < $b): 
    echo ‘a is smaller than b‘; 
else: 
    echo ‘a is equals b‘; 
endif; 

==================

/*错误的写法，解析器会报错*/ 
$a = 1; 
$b = 2; 
if ($a > $b): 
    echo ‘a is larger than b‘; 
else if ($a < $b): 
    echo ‘a is smaller than b‘; 
else: 
    echo ‘a is equals b‘; 
endif; 
?> 

php替代实例

<?php
if ($a == 5):
    echo "a equals 5";
    echo "...";
elseif ($a == 6):
    echo "a equals 6";
    echo "!!!";
else:
    echo "a is neither 5 nor 6";
endif;
?>

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