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Home Backend Development PHP Tutorial How much do you know about the function of PHP braces?

How much do you know about the function of PHP braces?

Jul 25, 2016 am 09:00 AM
  2. <?php
  3. /**
  4. *php braces example solution
  5. *site http://bbs.it-home.org
  6. */
  7. $arr=array(0=>123, 'name'=>'Little Pig');
  8. foreach($array as $k =>$v){
  9. echo "select * from blog_blogs where blog_tags like '%{$arr[$k]}%' order by blog_id"; //Adding a curly bracket just serves as the variable identifier
  10. }
  11. echo '<br/ ><br/ ><br/ ><br/ ><br/ ><br/ ><br/ >';
  12. foreach($ array as $k=>$v){
  13. echo "select * from blog_blogs where blog_tags like '%{{$arr[$k]}}%' order by blog_id"; //Add two curly brackets, outer layer will be treated as ordinary characters
  14. }
  15. //Use curly brackets to distinguish variables
  16. //echo "$arr['name']";//Using this sentence will report a syntax error
  17. echo "{$arr['name'] }";//This sentence is normal. The characters in the curly brackets will be treated as variables
  18. //$str{4} is followed by {} after the variable of the string. Curly brackets and square brackets are the same as a certain character. String variables are treated as arrays
  19. $str = 'abcdefg';
  20. echo $str{4};
  21. ?>
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