Php array exercise ---- query the number of keys with the same key value in the array, convert the array format, and merge Arrays

$ Array = array (){

[0] => array (6 ){
["Id"] => string (1) "2"
["Lessonid"] => string (3) "200"
["Userid"] => string (4) "6038"
["Username"] => string (8) "jsc11101"
["Lessontitle"] => string (47) "Module1-Unit2 I'm From China"
["Courseid"] => string (1) "4"
}

[1] => array (6 ){
["Id"] => string (1) "3"
["Lessonid"] => string (3) "201"
["Userid"] => string (4) "6038"
["Username"] => string (8) "jsc11101"
["Lessontitle"] => string (33) "Module2-Unit1 I Can Speak English"
["Courseid"] => string (1) "4"
}
[5] => array (6)
........................
}

Number of times of learning with the same lessonid

$ Study_num = array ();

Foreach ($ array as $ value ){

$ Study_num [$ value ['lesonid'] = (empty ($ study_num [$ value ['lesonid'])? 0: $ study_num1 [$ value ['lesonid']) + 1;

// If $ study_num [$ value ['lesonid'] is null for the first calendar

}

Number of times: $ study_num [$ lessionid]

Convert to an array with lessonid as the key

$ Lessonid_array = array ();

Foreach ($ array as $ key => $ value ){

$ Lessonid_array [$ value [lessonid] = $ value;

}

Learning text name: $ lessonid_array [$ lessonid] ['lesontitle']

Merge Arrays

Foreach ($ study_num as $ key => $ value ){

$ Lessonid_array [$ key] [count] = $ value;

}

The output array format is as follows:

$ A_array = array (){
Lessonid => array (7 ){

["Id"] => string (1) "3"
["Lessonid"] => string (3) "Learning text ID"
["Userid"] => string (4) "6038"
["Username"] => string (8) "jsc11101"
["Lessontitle"] => string (33) "Learning text name"
["Courseid"] => string (1) "4"
["Count"] => "learning times"

}
}

From the column xiaxia0083