A PHP reference is an alias, that allows two different variables to write it to the same value. In PHP version 5, an object variable doesn't contain the object itself as its value. It holds an object identifier that allows object accessors to find the actual object.When an object is ... Read More

In PHP version 7+, the getrusage function can be used. Below is a sample code demonstration −Example Live Demo//beginning of the script $exec_start = getrusage(); //other code functionalities //end of the script function rutime($ru, $rus, $index) {    return ($ru["ru_$index.tv_sec"]*1000 + intval($ru["ru_$index.tv_usec"]/1000))    - ($rus["ru_$index.tv_sec"]*1000 + intval($rus["ru_$index.tv_usec"]/1000)); } $ru = getrusage(); ... Read More

An else if is a better option.Below is a sample code for multiple if statements −if(condition_A){    //perform some action } if(condition_B){    //perform some action }Below is a sample code for else if statement −if(condition_A){    //perform some action } else if(condition_B){    //perform some action }When else if ... Read More

The answer is No. This is because 0123 means 123 with base 8 (an octal number) and its equivalent in decimal is 83.Prefixing a number with 0 indicates that it is an octal (base 8) number. This is similar to the fact that 0x indicates hex (base 16) numbers.Consider the ... Read More

Below is the code that can be used to strip the last comma from the foreach loop −Example Live Demo$result_str = array("Hi", "Hello", "have a", "good day"); foreach ($results as $result) {    $result_str[] = $result->name; } echo implode(", ", $result_str);OutputThis will produce the following output −Hi, Hello, have a, good ... Read More

ID has to be unique in a document −var option_avail = $('input[name=option_avail]:checked', '#controls').val()     firstoption     secondoption     thirdoption

Example Live Demofunction sentence_split($text) {    $before_regexes =       array('/(?:(?:[\'\"„][\.!?…][\'\"”]\s)|(?:[^\.]\s[A-Z]\.\s)|(?:\b(?:St|Gen|Hon|Prof|Dr|Mr|Ms|Mrs|[JS]r|Col|Maj|Brig|Sgt|Capt|Cmnd|Sen|Rev|Rep|Revd)       \.\s)|(?:\b(?:St|Gen|Hon|Prof|Dr|Mr|Ms|Mrs|[JS]r|Col|Maj|Brig|Sgt|Capt|Cmnd|Sen|Rev|Rep|Revd)\.\s[A-Z]\.\s)|(?:\bApr\.\s)|(?:\bAug\.\s)|(?:\bBros\.       \s)|(?:\bCo\.\s)|(?:\bCorp\.\s)|(?:\bDec\.\s)|(?:\bDist\.\s)|(?:\bFeb\.\s)|(?:\bInc\.\s)|(?:\bJan\.\s)|(?:\bJul\.\s)|(?:\bJun\.\s)|(?:\bMar\.\s)|(?       :\bNov\.\s)|(?:\bOct\.\s)|(?:\bPh\.?D\.\s)|(?:\bSept?\.\s)|(?:\b\p{Lu}\.\p{Lu}\.\s)|(?:\b\p{Lu}\.\s\p{Lu}\.\s)|(?:\bcf\.\s)|(?:\be\.g\.\s)|(?:\besp       \.\s)|(?:\bet\b\s\bal\.\s)|(?:\bvs\.\s)|(?:\p{Ps}[!?]+\p{Pe} ))\Z/su',    '/(?:(?:[\.\s]\p{L}{1, 2}\.\s))\Z/su',    '/(?:(?:[\[\(]*\.\.\.[\]\)]* ))\Z/su',       '/(?:(?:\b(?:pp|[Vv]iz|i\.?\s*e|[Vvol]|[Rr]col|maj|Lt|[Ff]ig|[Ff]igs|[Vv]iz|[Vv]ols|[Aa]pprox|[Ii]ncl|Pres|[Dd]ept|min|max|[Gg]ovt|lb|ft|c\.?\s       *f|vs)\.\s))\Z/su',    '/(?:(?:\b[Ee]tc\.\s))\Z/su',    '/(?:(?:[\.!?…]+\p{Pe} )|(?:[\[\(]*…[\]\)]* ))\Z/su',    '/(?:(?:\b\p{L}\.))\Z/su', ... Read More

Large files can be uploaded using PHP in two ways. Both of them are discussed below −By changing the upload_max_filesize limit in the php.ini file.By implementing file chunk upload, that splits the upload into smaller pieces an assembling these pieces when the upload is completed.The php.ini file can be updated ... Read More

The functions and classes in PHP have global scope. This means they could be called outside a function even after they were defined inside the scope and the other way round.But PHP doesn't support function overloading, and it is not possible to redefine previously-declared functions.The function can be defined as ... Read More

The fopen, fread and fwrite functions can be used to open a file stream, read a data stream and write that data to a file respectively.The file resource doesn't necessarily need to point to a location on the local machine itself.Below is an example that transfers a file from the ... Read More