PHP中elseif与else if的区别

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;

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/*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; ?>